Just look at Patreon and their continued stuggle with NSFW artists. I briefly worked on a similar smaller site that allows for artists drawing explicit things,

Just look at Patreon and their continued stuggle with NSFW artists. I briefly worked on a similar smaller site that allows for artists drawing explicit things, and our payment processor would threaten us weekly to cut us off for arbitrary reasons. The chargeback/fraud rate did not differ based on the user drawing explicit content or not.