One thing that gets the attention in incest stories (at least for me) is the moral conflict inherent to this fetish. Same goes for the rape, BDSM or mind control ones (even though they aren't my cup of tea).
Ever since humans learn how to write, literature served as a way to make readers experience things and sensations they usually couldn't, shouldn't or wouldn't be able to.
I find it dificult to get hooked on a story if there isn't any kind of dilemma or moral conflict. For me those are just an average Joe getting random chicks (if that's your thing tho, go ahead).
Take Lolita for example. It tells the story of a middle aged man who falls in love with a 12 years old girl. It's a very succesful book that was read by millions of people. Does that make them pedophiles? I don't think so... Uh... Some of them may in fact be, but that's not the point.
What I'm trying to say, and most people seem to have trouble understanding nowadays, is that literature, fiction, is one thing. Real life is another completely diferent. If you want to tell a love story involving siblings (Dreaming of Dana comes to mind), will you be glorifying incest? Not necessarily.
Yes, I get why patreon is frowning upon rape themes (mind control included) as it's quite of a sensitive topic today, but I can't, for the life of me, understand why they threw incest in the bunch. While it's a taboo fetish (what fetish ins't a taboo in itself anyway), it's a pretty harmless one.
I do understand that in real life incest is, most of the time, a non consensual relationship, but then again, Real Life =/= Fiction.
Without trying to ge too political, those mindsets (liberal, leftist and conservative) in their ever going war agains each other already ruined social media and are starting to crawl their way up other areas. This is not good, not at all.
Sooner you won't be able to even HAVE fetishes because they could offend someone. It sounds stupid, but it's real.
PS: God... I realized I sound like a pervert trying to defend his kinks... (heh, maybe I am)
PS2: I just realized I wrote a wall of text. No tl;dr tho, sorry.
PS3: Never had one.
PS4: Overpriced piece of tech.