https://orrery.sorcerousmachine.com/tags/ad-tracking/ Daily, weekly and monthly digests of AI industry news: model releases, research, security, funding and policy, synthesized for people building with AI. Hugo en-us https://orrery.sorcerousmachine.com/2026-09-21/ Mon, 21 Sep 2026 11:08:25 +0000 digest:2026-09-21 A measurement study published on 20 September documents __obi, a year-long OpenAI cookie that links a ChatGPT account to browsing on sites carrying OpenAI’s advertising pixel.