Basically Deviantart started their own AI graphic (i refuse to call this art) machine. You have to checkmark EVERY of your artwork one by one to not get used in AI engine. But that would be too easy. Its actually only for third party AIs. For being excluded or their circus you have to fill a form. For years on DA i got only 13 watchers, no exposure and met no friend here. So deleting account wasn't hard for me. Also in last time it became so hard to use (it wasnt easy in the first place)