Modern blockchain payment systems (see Base) have transaction fees that are an order of magnitude cheaper than any trad processors; they don’t discriminate based on moral grounds; transactions settle in seconds rather than days; they are not bound to only certain countries; funds are not custodially held by a single centralized tech company; the list goes on.
Much of the rationale for anti-crypto among communities that would most benefit from it (eg: NSFW art) is ill conceived and held together by an almost religious zeal.
There’s a lot of bad blood in the artistic community (on all fronts, production, distribution and consumption) to anything crypto due to the whole NFT thing… I don’t think you’re going to see anyone trying to do something that’s art + crypto for quite some time.
Use bank transfer or better yet instead, purchase gifts for the creator on their Amazon, Etsy, etc wishlist in exchange for content or use gift cards.
The above solutions are way better than crypto as it's mostly used for crime and illicit transactions and speculation.