Steam is a pain (for many) so GOG (good old game) would be a decent alternative.
GOG is offering for all games it hosts:
- free Steam code
- DRM free download
- auto update (if supported by the app)
- no additional software intermediary needed
- honest payment options
I wish GoG was as good as they paint it. We haven't had much luck there
Good to hear that you investigate alternative routes.
I would for commercial reasons evaluate if a direct download (from your own website, cutting out the middle man) like factorio does would not be more profitable - by the same time binding the developer and user more tightly together.
Anyhow - I would also try to brush up your Forum as this seems to be little visited as its a little rusty in approach- besides_ I get lost by different names given using RoI and Project Automata on different websites for the same product - you MUST stay with only one for corporate identity reasons - - my 2 cents.