0 of 550 top homepages block AI training with noai

An analysis of 550 homepages from the Tranco top 1,000 found that none send noai or noimageai tags, and none use nosnippet. Real AI opt-outs rely almost entirely on robots.txt and Bing signals: 21 sites send noarchive or nocache.

• 0 of 550 homepages send noai or noimageai
• 47 sites set max-snippet:-1, meaning no limit
• 21 sites use noarchive or nocache, Bing signals
• 7 noindex pages were logins and parked domains, not AI policy