Respectfully, I don't think this is true or a good perspective on the situation.
These sites aren't hosting copies made by LLMs. It's always just Wigglypaint from itch.io re-uploaded. The likelihood of a kid with an LLM "accidentally" generating Wigglypaint down to the pixel, every line of code and also the entire Decker software behind it 1:1... it's not reasonable. And I don't think this is a high schooler's misunderstanding either:
1) Some of these sites' owners are easily identified as adults.
2) Some of the sites claim, incorrectly, to be made by Internet Janitor or the "Wigglypaint team".
3) Tons of them are monetized: apps, referral links to other services, ads and offers of partnerships.
And furthermore, sidestepping any software technicalities: Most of them stole art from the artists here on itch.io to fill up their galleries. One of the apps even used these stolen artworks from itch in their promotional screenshots until more artists bought the app and they could use newly submitted work instead.
I just want to be very clear that these larger deceptive sites are not just run by some confused kid.