Hey there, I don't know if it's already written but I want to answer your question/explain the situation.
The reason why Patreon purges all the incest/rape/non-consensual games is quite simple.
Short answer:
Money and Reputation
Long answer:
It's an conflict between making money and loss of reputation. It's safe to assume that patreon doesn't care how it gets it's money (as long it's nothing illegal by law). The incest/rape/non-consensual(mind control for example) money income for patreon is very low (but income for them nontheless) and has only a small part of people which know about these games (creators and players), so they doesn't care (in the past).
But I've read here in the forum (a few weeks ago) that gamepress (or a another game newssite) threatened patreon to release an article about the incest/rape games. The headline decides if an article is read or not. Now imagine a headline like: "Patreon supports Incest/Rape games". Even it this isn't excatly true (but that's how media works). Given today's society (where everyone is offended by everything... and everything is rape) such an article would make quite the round through social media/other news sites.
So patreon would fear an huge image loss (e.g. fewer people who use that site --> fewer income of money). I assume that even now they don't care about these games (but to tie it now to my opening sentence) the loss of reputation (and loss of money) would be bigger than the income from those games (they're only a very small part).
So what would be the way to go for patreon? Yes, remove/change all the (or atleast the popular) games with incest/rape/non-consensual games.
I hope everything is understandable. The things I posted aren't facts, it's only my assumption. But it seems logical for me.
Sorry if this off-topic. I wanted to help a fellow member with his questions