Chris Long (co-founder of Nective, an SEO agency) published an "AI Instruction" page on their website (linked from the footer) and found that ChatGPT was using/citing the page within 48 hours. (he also shared receipts) He looked for other agencies that had something similar and found those were getting cited too (SEER is a standout example).

He shared his findings on LinkedIn & the comment thread is great:

• Marie Haynes pointed out that calling it "AI Instructions" could be interpreted as manipulation which goes against the Google spam policies now.
• He & Wil Reynolds both agreed and said they'd test it again without including "instructions" (SEER took their page down for now)
• Someone said it sounds similar to the Grounding Page concept that Hanns Kronenberg came up with and is documenting. He said they're seeing LLMs pick up the info and that the point isn't manipulation/optimization but to prevent entity confusion by making facts explicit, stable, and machine-readable.

No conclusion, just cool to see people testing things out and sharing what they learn. As a human I think this guy's grounding page is a refreshing read: no hype, just facts.