If your affiliate traffic is down 40% and your revenue is down 15%, you are not failing. You are watching the channel repriced in real time. The clicks that disappeared were mostly the cheap ones. The ones that survived are worth several times what they used to be, and the 2026 data says so plainly.
That is the whole story of affiliate marketing in AI search right now. Fewer visitors, better visitors. The publishers in trouble are the ones still measuring the old number.
The clicks really are gone, and the numbers are ugly
Start with the honest part. There is no spin that makes the traffic loss look small.
The Pew Research Center analyzed the browsing behavior of 900 US adults in March 2025 and found that when a Google AI Overview appeared, users clicked a traditional search result on about 8% of visits. When no AI Overview appeared, that figure was about 15%. Clicks on the links inside the AI Overview itself came in at roughly 1%.
An Ahrefs study published in February 2026 put the click-through decline for top-ranking pages at around 58% when an AI Overview is present, up from the 34.5% the same team measured in April 2025. Press Gazette’s tracking of major news publishers found global Google search referral traffic fell about 33% in the year to November 2025.
Affiliate and how-to sites took the worst of it, because “best X for Y” is exactly the kind of query an AI answer can resolve without sending anyone anywhere.
So yes, the volume is gone. Now look at what replaced it.
The visitors who still arrive are worth more
Similarweb’s 2026 cross-site analysis reported AI referral traffic converting at 11.4%, against 5.3% for organic search and 9.3% for paid search. AI referrals still make up only around 1% of total site traffic on average, so nobody is claiming this offsets the loss on volume alone.
But the mechanism behind that gap matters more than the gap itself.
When someone asks ChatGPT to compare three project management tools, the comparison happens inside the chat. The user narrows, questions, and decides there. By the time they click a link, they are not researching. They are buying. That click behaves less like a search result and more like the last step of a funnel someone else already built.
Similarweb’s data on ChatGPT’s May 2026 homepage-link update reinforces this. After the change, homepage referrals jumped from roughly 26 to 29% of ChatGPT’s referral traffic to about 62 to 63%, and it never drifted back. People are landing on brand front doors, not deep pages, because they have already made the decision the deep page was supposed to help them make.
What to do: stop reporting sessions as your headline affiliate metric. Report earnings per thousand visits and revenue per traffic source. If you segment AI referrals separately in analytics and they are converting at three times your organic rate, that is a budget argument, not a footnote.
Your audience is no longer sitting on one platform
A year ago, optimizing for ChatGPT covered most of the AI audience. That is over.
According to Similarweb’s 2026 Generative AI Landscape report, ChatGPT’s share of worldwide generative AI web traffic fell from roughly 76% in June 2025 to about 53% by May 2026. Gemini climbed from under 9% to around 27%. Claude went from about 2% to close to 9%. Total visits across generative AI platforms grew 70% year over year to 9.5 billion monthly.
ChatGPT did not shrink. The category grew around it.
The practical consequence is that a single-platform strategy now reaches about half the addressable AI audience. Gemini rides Google’s existing distribution through Search, Android, and Workspace. Claude grows through deliberate adoption by developers and technical buyers. If you sell software, those are different audiences with different buying power.
What to do: run your top 20 commercial queries through ChatGPT, Gemini, and Claude once a month and log which brands and sources get named. That is your new rank tracker. It takes an hour and it will tell you more than a keyword report will.
Getting cited is still an open field
Here is the number that should encourage anyone still publishing.
Similarweb found that citation presence in US ChatGPT prompts rose from about 1.6% in June 2025 to roughly 6.8% by May 2026. It more than quadrupled in eleven months, and it is still under 7%. Most brands are not showing up in AI answers at all.
Category matters. Travel and hospitality prompts carry a citation about 23% of the time and automotive around 20%, because those queries involve specific, checkable options. Professional services sits under 4%. Categories built on comparable facts get cited. Categories built on general advice do not.
That is a content brief hiding in a statistic. Original numbers, dated comparisons, specific model names, and real pricing get pulled into answers. Rewritten summaries of what everyone else already published do not.
What to do: make your content machine-readable and fact-dense. Structured markup does real work here, and our guide to Schema.org markup that AI systems actually parse covers the specific types worth implementing. The same logic applies to how you name things, which is why entity-first indexing and optimizing for embedding retrieval now matter more than keyword density ever did.
Two things worth watching
First, ads have entered the answer box. Similarweb’s 2026 report found roughly 26% of ChatGPT responses now contain an ad, with about a third of ad impressions landing on the first response in a session. Being cited is no longer the only competition for attention inside an AI answer.
Second, the merchants are moving too. Amazon’s payout changes were a reminder that commission rates are a lever the merchant controls and you do not, which we covered in our breakdown of the Amazon affiliate rate cuts. Higher-converting traffic is worth less if the rate underneath it keeps sliding.
Where the growth actually is
Awin reported that creators’ share of affiliate revenue on its network rose from 15.9% to 19.5% year over year. That is the fastest-growing publisher type on the network, and it is not a coincidence. Creators own a distribution channel that no algorithm update can take away in a quarter.
The lesson is not “start a TikTok.” It is that owned audience has repriced upward at exactly the moment rented audience repriced down. Email lists, communities, and direct subscribers were unglamorous for a decade. They are now the part of the business with a stable multiple.
The takeaway
Affiliate marketing did not break. Its unit economics inverted. Volume got cheap and scarce at the same time, while intent got concentrated into fewer, better clicks.
If you are still optimizing for sessions, you are optimizing for the metric that left. Optimize for being the source the answer is built from, and for the audience that arrives without an intermediary. Everything else is renting traffic from a landlord who keeps raising the rent.
Sources
- Pew Research Center, “Google users are less likely to click on links when an AI summary appears in the results” (July 2025) – pewresearch.org
- Similarweb, “AI Search Stats 2026: Market Share, Referral, and Citation Data” and the 2026 Generative AI Landscape report (July 2026) – similarweb.com
- Ahrefs AI Overviews click-through study (February 2026), as reported in industry coverage – ahrefs.com
- Press Gazette analysis of publisher search referral traffic to November 2025 – pressgazette.co.uk
- Awin, “Affiliate Marketing Trends 2026” – awin.com
- eMarketer, “Google AI Overviews decrease referral traffic as much as 25%” – emarketer.com
Last reviewed: July 31, 2026.
Affiliate disclosure: this site may earn a commission from links in this article, at no extra cost to you. It does not change what we recommend or what the data says.
