[TheSpiceIsLife]

I was under the impression F-Droid only hosts free open source software?

That's the impression Wikipedia seems to give:

https://en.wikipedia.org/wiki/F-Droid

So, for my use case: I want to run some proprietary software, F-Droid will be insufficient.

Happy to be proven wrong.

[techntoke]

Yes, however in cases like that an app store that only distributes officially signed packages and does some scanning as well as allows community to report issues should handle issues for packages that aren't open source. Nothing stopping something like that from existing if app creators wanted to start using it.

[crtasm]

For the official/default repos, yes.

You can add custom repositories in the fdroid app, as I understand it anyone can host a repo and put whatever they like on it.