As Cloudflare points out, the Perplexity’s genAI scrapers are cheating: https://blog.cloudflare.com/perplexity-is-using-stealth-undeclared-crawlers-to-evade-website-no-crawl-directives/
I’ll tell ya something, they’re not the only one. I look at the User-Agent values from the dumbass bots hitting my site and they’re obviously synthetic, designed to make you think they’re Chrome or Safari or whatever.