Oh, now that I'm thinking about it, it DID sound as an ad ^_^.
I'm not an associate of Itch.io.
I do have an account there and plan to eventually make an Itch release of my firstborn RepoMaker
And maybe to participate in jams, they kind of have a nice infra for that.
I use it to find some new cool (and often opensource) stuff to play/commit sth.
That's really it.
About "Indie" - that is a very vague term.
According to Wikipedia https://en.wikipedia.org/wiki/Indie_game
FO can be pretty much classified like that.
And there are games on Itch sharing similar to FO dev model. Quite many of them in fact.
And Zero-K that I mentioned is a FOSS (greatly improved) successor of Total Annihilation which is kinda what FO is doing with MoO here.
Free Orion is not really a _remake_ of MoO.
Right now as it seems it is a small team+community effort to deliver a MoO-inspired _great_ 4X strategy.
I've seen and played Stellaris and GalCiv and the new Orion thingie, but they never have the great feel of, for example, Endless Sky.
You know, when the game does not treat you as a customer (although I did like GalCiv I as a child).
So my motivation here is that I want to see a great space 4X free of proprietary BS and play it.
Unfortunately the thing with modern development is that if you can't gain enough development speed you fall behind and get forgotten. A crapton of obsolete legacy code will make starting a new space 4X in, for example, Godot engine much more feasible than to reanimate stuff.
(That's why people want to get rid of Xorg and rewrite my daily workhorse-KiCad for example).
Pretty much the only way to gain the devspeed for opensource is to broaden community and to recruit devs from community.
So broading the playerbase by any means is a matter of survival of the project.
And platforms like Itch that have a solid playerflux and simultaneously don't cripple you with bureaucracy are great for exactly that.
Also publishing on Itch does not ban you from Steam or anything since it is all free.