Now, porn is allowed on twitter, many adults who post nsfw are very laid back, kind, just mind their own business, don't want children on their account, which is okay, normal. Cristali's followers are 90% kids on twitter, amino, and youtube. He's completely aware his fans, followers are underaged, he made porn of Zafiro his avatar, background, the background uncensored. His fans did not follow him for his traced, stolen porn, they just followed him because they thought he was nice, like his characters. The 18+ sign was not there before, he only recently put it in there after being caught showing, advertising, selling porn to minors on Patreon. 

I had to censor it for the public 

Even other adult pornagraphy artists who have come upon Cristali_Draws twitter found it disgusting, David a creep, think his account needs to be banned. That's really saying something if even other nsfw artists have a problem with him. David does not care, just blames everyone else.