By Ronn Torossian, Founder, 5W
 

Affiliate marketing is now a $20 billion global channel returning $12 to $15 for every dollar invested. It contributes roughly 16% of all U.S. e-commerce sales. By the end of 2026, an estimated 90% of e-commerce businesses will run an affiliate program.

And most of those programs will quietly lose money.
 

Not on the P&L. The dashboards will look fine. Last-click attribution will hand the program credit for tens of thousands of conversions per quarter. The CFO will look at the ROAS number, nod, and approve the next budget cycle.
 

The problem is that the dashboard is measuring the wrong thing. Most affiliate programs are not generating new revenue. They are paying commissions on transactions that were going to happen anyway.
 

The recruitment problem

Performance-only agencies recruit affiliates through three mechanisms: network browsing, cold outreach, and commission incentives. Those mechanisms select for the partners willing to respond — which means coupon sites, deal aggregators, cashback platforms, and content farms whose primary revenue model is affiliate income.
 

These partners convert. They convert because they intercept buyers at the very bottom of the funnel — at the moment of purchase intent. They convert customers who already decided to buy.
 

The partners that actually move the needle — the editor at a top beauty publication, the personal-finance newsletter with 400,000 engaged subscribers, the creator whose product reviews drive entire SKU launches — do not respond to cold outreach. They have more partnership requests than they can process. They cannot be bought. They have to be earned.
 

First, the influencer-affiliate line collapsed. Editors at major publications now operate under revenue mandates. Affiliate-enabled products get priority placement over non-affiliate products regardless of editorial merit. Ten percent commission is now the floor at top-tier publications.

Second, the buyer journey lengthened. A 2,368-brand North American analysis found affiliate click volume up 2% year over year — but conversions down 5% and conversion rates down 6%. 
 
 Shoppers now use affiliate content for research and comparison earlier in the journey, then convert through other channels closer to purchase. Last-click attribution doesn't see this. It sees coupon affiliates capturing demand that high-quality content partners actually generated.

Third, AI is rewriting discovery. Nearly 80% of affiliate marketers now use AI tools. Google AI Overviews and generative answer engines are compressing traditional organic click-through rates for affiliate content. The work of getting cited inside AI answers — a discipline most marketers now call GEO — runs through the same high-authority editorial properties PR has cultivated for decades. The discovery layer is collapsing into the citation layer.

Five things. Each of them is a question your CMO should be able to answer this quarter.

One: how many of your top 20 affiliate partners are content publishers with original editorial authority, versus coupon, deal, or cashback aggregators? If the answer is fewer than 10, you are running a margin program, not a growth program.
 

Two: what percentage of your affiliate revenue is incremental — meaning customers who would not have purchased without that partner's content? If you cannot answer this with a number, you do not know what your affiliate program is worth.
 

Three: what percentage of your affiliate-driven new customers come from content partners versus deal partners? Fifty percent of CPG affiliate revenue comes from new customers. If your number is lower, you have a recruitment problem.
 
Four: what does your fraud rate look like? Industry baseline is 18%. If you are not measuring it, you are paying it.
 
Five: what is the median tenure of your top 20 partners? Long-tenured partners signal a healthy program. A roster that turns over every quarter signals a program that recruits on price.
 

Affiliate marketing has spent two decades being treated as a performance channel. The brands that keep treating it that way will keep building rosters dominated by transactional partners that look healthy on a dashboard and cost margin everywhere else.
 

The brands that treat affiliate as a relationship channel — anchored by trusted editorial publishers, high-authority creators, and media properties whose audiences took years to build — will own a moat their competitors cannot rebuild on a quarterly budget cycle.
 
That moat is not technology. It is not commission structure. It is not attribution math. It is the relationships.

And in 2026, with AI compressing every other discovery channel, the relationships are the only thing left that compounds.

Check out 5W’s research report on affiliate marketing here: https://www.5wpr.com/research/affiliate-marketing-2026/