I've tried repeatedly, Stripe (only cc processor allowed on itch) doesn't allow adult content.
I can use CC through stripe if I let itch handle the payments 100%, but they take more and the hold onto the money longer. with direct integration their is less fees and I get they payments instantly. I have argued with Stripe repeatedly on this issue on how they accept cc payments all day long for adult content here, and quite a few of them can be consider child pornography...