itch chose to not shutter their own damned platform. If they had chosen to take a stand, not only would NSFW devs have lost the ability to profit from their work on Itch, but the SFW devs, too.
Don’t get tangled up in the details and lose sight of the big picture. SFW devs aren’t going to be left SOL, and we can focus on preventing the payment processors from doing this elsewhere.