Family Faring is viewable for me, just clicking on the link to their account.
I think that you are reaching here, because I asked about bestiality, rape, and incest, but the problem with Family Faring and other "games that have content that almost every single site does not allow" as your example is that we're not really talking about bestiality, rape, and incest. It's pretty clear, just looking at Family Faring's banner, that they have another kind of content, let us call it "loli", that would be the reason.
Also, no, Patreon doesn't only enforce it until it's reported. There have been large swathes of creators removed at once and without explanation because Patreon decided to suddenly crack down on specific kinds of content. I've seen these creators en masse enter the Patreon Discord server and complain about it, looking for some kind of recourse and getting nowhere. Typically, if Patreon cracks down on a lone creator, they give that creator a chance to change their content before going with a permanent ban.
Also, no, SS is not (primarily, as you imply) known for pedo content. There are a lot of developers kicked off of Patreon that moved to SS, or have opened a SS account just in case, and most adult devs on there aren't doing pedo content.
Anyway, this is diverging a good bit from LISC. I think it's safe to say that LISC, instead of risking Patreon account ban and moving to SS, has decided the wiser course is to appease Patreon. This is probably the right choice, if they want to continue as a serious developer, given the payment issues with SS.