Actually, the Chaturbate instaban thing is not a new thing either. Kati3kat, who is one of the most popular camgirls in the industry, got hit with an instaban years ago from people reporting her account. I believe her account was unbanned shortly afterwards, but by then she had already moved over to MFC and took a lot of her fans with her.
The reason why a lot of things are bannable offenses isn't because there's laws surrounding it. It's perfectly legal to pee on someone and film yourself doing so. It's perfectly legal to shove whatever you may wish into whichever orifice you want. It's the payment processors who make these rigid rules. I don't know exactly how the payment processors go about policing these rules, but what I do know is that if there's a ton of people violating the terms the payment processors can shut down the merchant account and then the site would have no way of actually getting money. As of right now, what can shut down a site is if they are allowing models to do legitimate illegal stuff. Like in American based sites, because of FOSTA/SESTA you can't offer to take tokens in returns for dates, because it is seen as escorting. You obviously can't have minors on camera, because again, stupid highly illegal. Those will shut down a site.
Other than FOSTA/SESTA what legislation are you talking about? Because FOSTA/SESTA wasn't about preventing kids from seeing porn. It was put in place to stop online sex trafficking (which we all know is bullshit). Yeah, the UK porn ban was to prevent kids from viewing any adult content, not just intense acts, but that was put on an indefinite hold.
I wouldn't put a whole lot of stock in something that one member who likes to make believe is Chaturbate support is going around saying.