I've been watching this ripple over every nsfw community and site I hang out on for several months now. Finally came to roost here. Wonder how long it'll be till e6 and FA are gone. They're not major commerce sites, but they still have to pay their hosts, and be able to accept donations in the case of FA.
Viewing post in Itch has shadowbanned NSFW games comments
The problem with "We'll make our own payment processor for blackjack and hookers" is that banking and payment processing is highly regulated so there's a huge barrier to entry, plus most people don't want to have to create multiple accounts to buy things online.
I'm not a crypto guy or anything but this might be the only use case I can see for it since it's still unregulated and decentralized enough that campaigns like this wouldn't cripple entire industries.