I've thought about submitting to the source but I imagine that dumping two files in the root directory for a build tool that the devs don't use or even know about is a hard PR to get merged. But maybe that's not even the optimal way to distribute flakes, and it ought to be in a different place altogether, like nixpkgs or flakehub.

I'm only just now looking at publishing on flakehub. It does look like many users can point at individual repositories that just package external software. It looks like this encourages a repository for each application. Thanks for suggesting.

This is certainly an option, just wondering whats done most in practice. Right now this is what my own flakes do.