A lot of brands still treat affiliate marketing like free money. That is a costly habit. The smarter question this year is not how many conversions an affiliate reports. It is how many of those conversions would have happened anyway.
New incrementality testing puts a number on the problem. Brands that ran structured tests found that 18 to 24 percent of attributed affiliate conversions were not truly incremental. The sale was coming regardless. The affiliate just got credit for standing near the finish line.
The usual suspects show up late in the buying journey. Checkout coupon sites. Cashback portals. Affiliates that bid on “brand plus coupon” searches. They catch shoppers who already decided to buy and were one tab away from the cart anyway.
This is not a reason to kill affiliate marketing. It is a reason to measure it properly. Run holdout tests. Pause a partner for two weeks and watch what happens to sales. If nothing drops, you found a tax on growth, not a growth channel.
The founders talking about this in r/Entrepreneur keep landing on the same point. A channel that cannot prove extra business impact will quietly drain your budget. Affiliate marketing earns its place when it brings in buyers you would not have reached on your own.
For affiliate publishers, the message is clear too. Move up the funnel. Introduce products to people who have never heard of them. That is incremental value, and it is the work that survives every measurement audit a brand throws at it.
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