you really shouldn’t use itch.io if you are just going to sell steam keys
Viewing post in Wishlist game on steam! #09 comments
Hi!
External keys for steam are supported directly by itch.io by Distribution tab from dev panel. Itch.io is dev friendly in this case.
I also not plan to directly sell steam keys just make sure that people don't need to pay twice for the same game. Btw. Game in it current paid version is available only on itch.io