But there's plenty of successful US-based sites that host both SFW and NSFW content: Reddit, Twitter, Tumblr (before Yahoo), DeviantArt, etc Even it seems Patr

But there's plenty of successful US-based sites that host both SFW and NSFW content: Reddit, Twitter, Tumblr (before Yahoo), DeviantArt, etc Even it seems Patreon (which I've actually heard it described as an "NSFW launderer") -- is fundamentally built upon interactions with credit card and banks. I don't know how true it is, but I've read that payment processors like Visa and Mastercard are actually agnostic -- it's the high-rates of chargebacks that they have a problem with.