But Patreon and Steam made a work around. For example Patreon has age verification and says exactly what kind of NSFW is OK. It's better than omitting all NSFW from making profit
Viewing post in Any update on payment processors and NSFW ban?
Patreon has, right this minute, many games and other content that are explicitly against CC TOS. The ONLY reason this is the case is that they do what platforms have done for years now: turn a blind eye and hope the processors don't notice/raise a stink. Which only works until a Collective Shout comes along. Because of this arrangement, they are anything but clear about what's acceptable, and what is "acceptable" is unstable, which is why for the past year or two (and really since Pateron's inception) the circle of what you can post on Patreon has been getting smaller, and smaller, and smaller.
Same story for Steam, except worse/more strict. The "Workaround" for Steam and Patreon is to a. whistle past the graveyard and b. axe all but the most generic, middle-of-the-road inoffensive content, something like Barely Working (which despite that rather backhanded compliment is a great game, check it out!). If Itch purged everything but hot (HUMAN) milfs having totally normal consensual straight sex in the missionary position, yes, payment processors would (probably) be okay with it...for now. But that would kill the whole point/vibe of the site, which is to share weird, offbeat creative stuff.
The gun to Itch's head is the same gun pointing at every major platform right now: you WILL enforce normality. You WILL allow only thought, expression, "creativity" that is as bland and inoffensive as possible. Or you will cease to exist, because no business can operate once it's cut off from money. Free speech, free expression, the First Amendment etc have effectively become meaningless, because Visa and Mastercard have crowned themselves as a fourth branch of government, and an untouchable one at that.
We are watching the total destruction of the free internet. Porn is just one small chunk of it.