This is exactly what will happen, Meta will just add a “next page” thing after 100 items that does a cool animation when you click it and the feed will continue as usual. Meanwhile we’ll start stacking up similar bills everywhere else and small operators will close down when they start getting worried about keeping up with 50 states worth of different regulations.
Goal achieved: media centralized.
I'm trying to think of a small operator that absolutely needs inifinite scroll on their site for their product to "work" and nothing comes to mind.