>>5882231Actually making money off of fanart is illegal if the creators decide to send you a cease and desist and you dont stop all current and future sales immediately. They can do it even if you just draw their characters and post them online. It happened to teenagers in DA that drew Balto fanart (no not just the furfags) and it can happen to you at any time.
The only guaranteed blind spot is r34 of disney characters, nobody at that company wants to report that shit because they dont want to have to admit they searched for it.