E-commerce continues to grow across major international markets. But growing online sales do not automatically translate into higher profitability for individual retailers.
Online shops are competing for increasingly fragmented consumer attention while simultaneously managing customer acquisition costs, fulfilment, returns, discounts, payment fees, customer service and growing competitive pressure.
The central challenge is therefore no longer simply:
How can an online shop generate more traffic?
The more important question is:
How can an online retailer generate additional profitable sales without increasing its own advertising budget at the same rate?
This is where performance-based affiliate marketing becomes particularly relevant.
Unlike traditional advertising models, affiliate marketing can allow retailers to build a distributed sales channel in which external publishers invest their own resources, reach, technology and, in many cases, advertising budgets to generate sales.
At selecdoo, connected online shops currently achieve an average ROAS of 4.9x or higher through affiliate marketing.
That means, in simplified terms:
€1 in attributable performance-based marketing costs generates at least €4.90 in revenue on average.
But cost efficiency is only one part of the story.
The underlying structure of affiliate marketing can fundamentally change how an e-commerce business approaches customer acquisition and growth.
The E-Commerce Challenge in 2026: Profitable Growth
E-commerce businesses have access to more advertising channels, technologies and customer data than ever before.
At the same time, acquiring customers profitably remains one of the fundamental challenges of online retail.
Traditional paid media usually requires the retailer to finance customer acquisition upfront.
The business pays for:
- clicks
- impressions
- advertising reach
- traffic
- campaign budgets
- creative production
- campaign optimisation
before knowing whether those investments will ultimately result in a sale.
The simplified model looks like this:
Advertising budget → Traffic → Conversion → Revenue
The problem becomes particularly apparent when an online retailer wants to scale.
If €10,000 in advertising generates a certain amount of revenue, significantly increasing revenue will often require additional advertising investment.
In other words:
The retailer finances growth upfront.
That model can work extremely well when campaigns are profitable.
But it also means that the retailer carries most of the initial media risk.
Affiliate marketing can change this economic relationship.
How Affiliate Marketing Changes Customer Acquisition
In a performance-based affiliate model, external publishers promote products and generate customers for the retailer.
Depending on the publisher and the programme, those partners may invest their own:
- advertising budget
- technology
- content
- websites
- audiences
- marketing expertise
- social communities
- campaign infrastructure
- data
- optimisation resources
The commercial relationship can therefore look fundamentally different.
Instead of:
Retailer pays for advertising → Traffic is generated → Customer may purchase
the model can become:
Publisher invests → Publisher generates traffic → Customer purchases → Retailer generates revenue → Publisher earns commission
Under a pure Pay-per-Sale model, the publisher earns its commission when a defined and valid sale has been generated.
This transfers part of the customer acquisition risk away from the retailer.
If a publisher invests money into a campaign that fails to generate sufficient sales, the publisher initially carries the risk associated with that investment.
The retailer, meanwhile, can link its affiliate costs directly to measurable transactions.
Why Affiliate Marketing Can Reduce Customer Acquisition Risk
This difference is important.
Consider a traditional CPC campaign.
An online retailer might spend €10,000 on advertising.
Whether that investment produces €5,000, €20,000 or €100,000 in revenue is not known when the advertising budget is committed.
The retailer carries the advertising risk.
With performance-based affiliate marketing, publishers can finance customer acquisition themselves and recover their investment through commissions generated from successful sales.
This creates a different incentive structure.
The publisher must determine:
- which audiences to target
- which channels to use
- which products to promote
- which campaigns convert
- how much traffic is worth
- which creatives perform
- which keywords are profitable
- how much advertising budget can be invested
The publisher therefore has a direct financial incentive to generate profitable and measurable results.
For the retailer, this creates a highly variable customer acquisition model.
Affiliate Marketing Is Much More Than Influencer Marketing
One of the biggest misconceptions surrounding affiliate marketing is that it primarily consists of influencers, bloggers and voucher websites.
Modern affiliate marketing is considerably broader.
Depending on the conditions of an affiliate programme, publishers can generate sales across a wide range of marketing channels.
Paid Search
Performance publishers can use search engine advertising to reach users actively searching for relevant products.
This can create additional visibility across search environments without requiring the retailer to finance every campaign directly.
Brand bidding and other search activities must, of course, follow the individual rules defined by the advertiser.
Shopping and CSS
Shopping publishers and Comparison Shopping Services can promote products through Google Shopping and other product discovery environments.
These channels can be particularly valuable because users searching for specific products often already demonstrate strong commercial intent.
Display Advertising
Publishers can operate their own display campaigns across websites and advertising networks.
The publisher can finance the media spend and optimise campaigns based on the commissions generated from resulting sales.
Native Advertising
Native advertising allows publishers to distribute products and offers through discovery and editorial environments.
This can extend a retailer's reach beyond traditional search and social advertising.
Content and SEO
Publishers can generate customers through:
- product reviews
- buying guides
- product comparisons
- editorial recommendations
- niche websites
- organic search traffic
High-quality content can continue generating transactions long after it was originally published.
Influencers and Creators
Creators can promote products through platforms such as:
- TikTok
- YouTube
- blogs
- newsletters
- communities
Tracking links, voucher codes and dedicated landing pages can connect those activities directly to measurable sales.
Comparison Platforms
Comparison publishers can reach users who are already evaluating products, brands, prices or providers.
These visitors can have particularly strong commercial intent.
Voucher and Deal Publishers
Voucher and deal platforms can reach consumers close to the purchasing decision and provide additional conversion incentives.
Loyalty and Cashback
Cashback and loyalty programmes can reward consumers for completing purchases and provide retailers with access to established customer communities.
Affiliate marketing therefore should not be viewed as one advertising channel.
It is better understood as a performance-based distribution model that can operate across multiple marketing channels.
The Real Scaling Advantage of Affiliate Marketing
This is where affiliate marketing becomes particularly interesting for larger e-commerce businesses.
A single publisher might only generate a limited number of sales.
A network of hundreds or thousands of potential publishers creates a fundamentally different structure.
Different publishers can use different:
- audiences
- keywords
- websites
- advertising networks
- platforms
- technologies
- creatives
- funnels
- countries
- marketing channels
at the same time.
Instead of one internal marketing team trying to operate every possible acquisition channel, an affiliate programme can create a decentralised network of external performance marketers.
The retailer provides the product, commercial conditions and commission.
Publishers provide distribution.
Scaling Without Proportionally Increasing the Retailer's Own Media Budget
Traditional paid-media scaling often follows a relatively simple relationship:
More advertising budget → More traffic → More potential sales
This means that substantial growth can require substantial additional capital.
Affiliate marketing can operate differently.
Multiple publishers can simultaneously invest their own money and resources into acquiring customers.
A retailer can therefore potentially receive additional sales from:
Search + Shopping + CSS + Display + Native + Content + SEO + Social + Influencers + Comparison + Loyalty + Cashback + Deal Platforms
without directly financing every advertising campaign behind those sales.
This does not mean that affiliate marketing has no cost.
The publisher receives a commission.
The crucial difference is when and why that cost occurs.
In a Pay-per-Sale model, compensation is connected to the result.
That makes affiliate commissions a variable acquisition cost rather than a traditional upfront media investment.
Example: What a 4.9x ROAS Means
The online shops connected to selecdoo currently achieve an average ROAS of 4.9x or higher.
A simplified example illustrates what this means.
At a 4.9x ROAS:
€10,000 attributable marketing costs → €49,000 revenue
At a 6x ROAS:
€10,000 → €60,000 revenue
At an 8x ROAS:
€10,000 → €80,000 revenue
ROAS should not be confused with profitability.
A retailer still needs to account for:
- cost of goods
- shipping
- returns
- payment processing
- discounts
- taxes
- fulfilment
- other variable costs
A 4.9x ROAS therefore does not automatically mean that every sale is profitable.
However, the metric demonstrates the revenue efficiency that a performance-based distribution model can achieve.
Affiliate Marketing as External Performance Sales
Modern affiliate marketing can therefore be described more accurately as external performance sales.
The retailer provides:
- products
- brand
- website
- tracking
- commission
- programme conditions
Publishers contribute:
- audiences
- traffic
- content
- technology
- marketing expertise
- advertising capital
- campaign optimisation
- distribution
Both parties ultimately depend on the same outcome:
Sales.
The retailer wants additional profitable revenue.
The publisher needs sales to earn commissions and recover its investment.
This creates a strong alignment of commercial incentives.
Why Diversification Matters
There is another strategic advantage.
Many online retailers depend heavily on a relatively small number of acquisition platforms.
For example:
Google + Meta + marketplaces
can represent a substantial share of customer acquisition.
This creates concentration risk.
Changes to:
- advertising costs
- algorithms
- tracking
- attribution
- platform policies
- competition
- account restrictions
can have an immediate impact on customer acquisition.
A broad affiliate programme can diversify distribution.
Instead of relying exclusively on a small number of internal paid-media channels, a retailer can gain access to many independent publishers operating across different marketing environments.
Affiliate marketing therefore provides more than another source of sales.
It can become an additional distribution infrastructure.
Why Affiliate Networks Matter
Recruiting, tracking and managing individual publishers directly can become operationally expensive.
An affiliate network provides the infrastructure connecting advertisers and publishers.
Instead of negotiating separate integrations with every partner, retailers can use a network to manage:
- tracking
- attribution
- commissions
- publisher relationships
- programme conditions
- transaction validation
- reporting
The network effect becomes particularly important as the number of participating publishers increases.
One publisher might reach one specific audience.
Another may specialise in Google Shopping.
Another may operate content websites.
Another may generate traffic through paid search.
Another may specialise in native advertising.
Another may operate internationally.
Combined, these publishers create a distributed customer acquisition ecosystem.
selecdoo as a Performance-Based Distribution Channel
selecdoo connects online retailers with publishers capable of generating sales through different marketing channels.
Depending on the individual affiliate programme, these channels can include:
- Search
- Shopping
- CSS
- Display Advertising
- Native Advertising
- Content
- SEO
- Social Media
- Influencers
- Comparison Platforms
- Deal and Voucher Platforms
- Loyalty
- Cashback
This provides retailers with access to additional distribution, audiences and external marketing resources.
Publishers can independently invest in customer acquisition and recover their investment through commissions generated by successful transactions.
Across online shops connected to selecdoo, the current average ROAS is 4.9x or higher.
The objective is therefore not simply to generate additional traffic.
It is to create an additional performance-based sales channel.
The Future of E-Commerce Growth Is About Profitable Distribution
E-commerce growth is increasingly becoming a distribution problem.
Online retailers already have access to sophisticated shops, payment systems, analytics platforms and advertising technologies.
The challenge is reaching enough potential customers at an economically sustainable acquisition cost.
Continuously increasing internal advertising budgets is one possible strategy.
Building a distributed network of external performance partners is another.
Affiliate marketing enables retailers to work with publishers that contribute their own:
capital, audiences, technology, content, expertise and distribution.
The retailer compensates successful results through commissions.
This creates a fundamentally different scaling model.
Instead of asking:
How much more advertising budget must be invested to generate more revenue?
the question becomes:
How many additional performance partners can profitably distribute the retailer's products?
For e-commerce businesses looking to diversify customer acquisition, reduce dependence on individual advertising platforms and scale revenue without financing every additional impression or click themselves, affiliate marketing can therefore become an important part of the growth strategy.
Frequently Asked Questions
What is affiliate marketing for e-commerce?
Affiliate marketing is a performance-based distribution model in which external publishers promote an online retailer's products and receive a commission for attributable results. Under a Pay-per-Sale model, the commission is linked to a successful and valid sale.
Why can affiliate marketing reduce customer acquisition risk?
Publishers can invest their own resources and advertising budgets into generating customers. Instead of the retailer paying upfront for every click or impression, compensation can be linked directly to successful sales. This transfers part of the initial customer acquisition risk to the publisher.
Which marketing channels can affiliate publishers use?
Depending on the rules of the individual affiliate programme, publishers can generate sales through Search, Shopping, CSS, Display Advertising, Native Advertising, Content, SEO, Social Media, Influencers, Comparison Platforms, Voucher and Deal sites, Loyalty programmes and Cashback platforms.
What ROAS do online shops achieve with selecdoo?
Online shops connected to selecdoo currently achieve an average ROAS of 4.9x or higher. A 4.9x ROAS means that €1 in attributable performance-based marketing costs generates at least €4.90 in revenue on average.
Can affiliate marketing scale without increasing an online shop's advertising budget?
Affiliate marketing can allow additional sales to grow without requiring the retailer's own media budget to increase proportionally. Publishers can finance their own campaigns and recover those investments through commissions. The retailer still incurs affiliate costs, but under a Pay-per-Sale model those costs are directly linked to successful transactions.