OpenAI, Google, Microsoft and Anthropic Back One Opt-Out From AI Training. What It Covers, What It Doesn’t, How to Set It

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OpenAI, Google, Microsoft and Anthropic say they will honor one shared robots.txt rule against AI training, from an IETF draft published on 30 October. Anthropic says it has started, OpenAI aims for the coming months, Microsoft starts on 1 February 2027 and Google in 2027. What the signal covers, what it does not (AI answers, crawling, payment), whether it is binding, and how site operators set it.
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Reddit Is Putting Up a Login Wall. Why AI Search Pushed It There, and What Changes for You

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Reddit will move to a primarily logged-in experience, with tests outside the U.S. from the fourth quarter of 2026. The reason: search referrals fell by more than a million per week in October as Google’s AI answers keep the clicks. What still works, why logged-in users are worth more, the data-licensing angle, and what companies and users should do now.
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