What if itch suddenly decides again to screw over NSFW creators in... "new and innovative ways", would we then get a key for steam? Or would it just be "bad luck"?
I consider them to be different platforms and they don't intersect. Each has its own advantages. On Itch my games cost the same as on Steam, but they are available at the development stage, but on Steam the game library is more user-friendly. Each user has to choose which platform is more convenient for him.
But specifically about your question, if itch stops distributing adult games, I will be glad to provide links to download my games.