They don't actually allege anything. They add in the keywords without going so far as to say "this website is doing X." It's enough to trip the keyword filters at Cloudflare and other hosting providers and reverse the burden of proof.

Problem is they have way more money to fight and that’s basically their whole playbook. I was caught up in a fraudulent libel claim that had to settle* back in the Twitter days. When those companies want to come after you, it’s really hard to fight back.

* no money was exchanged just some guarantees to not disclose their client and remove tweets.