however this doesn't stop the website from doing what they can to stop scraping attempts, or using a service to do that for them
Isn't this country dependent though?
Even if you 403 them, do it as slow as possible.
But really I would infinitely 302 them as slow as possible.
Whatever cleaning they do is not effective, simply because it cannot scale with the sheer volumes if data they ingest. I had an LLM authoritatively give an incorrect answer, and when I followed up to the source, it was from a fanfic page.
Everyone ITT who's being told to give up because its hopeless to defend against AI scrapers - you're being propagandized, I won't speculate on why - but clearly this is an arms race with no clear winner yet. Defenders are free to use LLM to generate chaff.