Most paysites use bugbounty to lure gullible people into reporting flaws, some of which are critical vulnerabilities and extremely valuable.
CVE Details has pointers for severity assessment. Also, paywalls themselves will protect high profile criminals while ousting low fish and you can stay certain governments won't bat an eye; doxxing and death threats have happened without any repercussion when they come from high profile content creators.
Patreon did lose a few lawsuits but it's still very much alive. Same for OnlyFans. Both did quite nefarious stuff or encouraged it while sweeping it under the rug by ousting tiny hate groups and activists to divert attention.
As for solutions for artists, there are plenty and no one is forced to follow the platform's default model. In fact, they never should as it is tailored to guarantee the platform optimal profits unless you're on something like, say, itch, if the artist happens to work on a game.
