Furthermore, my impression of Tumblr was that it had quite a bit of artists. Most artist-oriented platforms have policies that aim at banning the more overt commercial pornography, while allowing artistic nudity or erotica with appropriate tags (see DeviantArt, Vimeo, etc.) I was actually quite surprised that Tumblr didn't try this route at first to be honest. From what I can tell the "adult content ban" Tumblr implemented is way overly broad-based, not to mention very US-moral attitude centric (eg "female presenting nipples" is less of a big deal in many countries).