The AI Licensing Market Is Visible in HTTP Status Codes

Yesterday I pulled apart how Time serves ads to AI agents, and I said at the end that I wanted to find out how many other publishers were doing the same thing. So I built the measurement, pointed it at 436 sites, and got an answer I did not expect: almost nobody. Differential serving — showing agents a different document than you show humans — turns up on 1.8% of the panel, and Time is the only site in it serving advertising payload to agents.