I got this too last Sunday. I was so happy, I nearly replied to the spammer. The spam reads:
> mister-muffin.de: invisible to ChatGPT and Claude
> ChatGPT, Claude, and Perplexity can't read your content:
> A SaaS we audited in April had the same gaps. After adding 3 files: 0 → 1,200 AI-driven visits/week. That's a third of their fresh traffic now.
> P.S. Cloudflare made the test public (isitagentready.com) — your competitors are already on it.
Too bad it was only spam... :(