Yeah, nsfw stuff's still banned on tumblr, on deviantart you have to censor it, even when posting behind mature content warning
If you don't like twitter, then you can use pixiv or furaffinity (I'm not into furries but they accept any kind of work ;p) in both those places you just have to mark your work as mature
Oh! there's also pillowfort, which goes out of beta soon - it's a tumblr-like platform built after tumblr's porn ban