Then Roblox trains on it and voila…

Party A: hosts largely copyrighted material, says they are opposed to copyright in its current form

Party B: massive IP business , very aggressive about everything from brand to software, defends and monetizes current copyright regime

I think it’s fair for party A to call out party B for downloading a massive trove of known-copyrighted material.

Game companies generally don't care if you don't make money from your mods or fan projects. And yes technically copyright nowadays lasts until the heat death of the universe but 10 year old games are in commercial limbo.

Ofcourse AI providers very much DO want to make money with their trained models.