That is the problem I discussed before, itch.io allows this thing happen for its own profit these day. leafo
I suggest everyone who likes to stay in itch.io buy the game through individual developers directly not these careless distributor.
https://itch.io/t/165252/itchio-notice-2-there-are-many-distributors-coming-on-i...
And to LorenLemcke
I don't believe there is no way to have standalone version of the game, Steam don't insist DRM into every game on Steam. There are many instances for DRM-free games on Steam. And since your game is not MMO, there is no problem with server.
I would like to quote the developer of The Norwood Suite's reply: "Under what circumstance would getting a steam Key through itch be preferable to getting the game through Steam directly?"
https://partner.steamgames.com/doc/features/drm
http://steam.wikia.com/wiki/List_of_DRM-free_games
https://itch.io/t/159970/do-itchio-buyers-get-steam-keys
whiteblack