I can't speak for others, but many of my company's open-source projects are not open-contribution (meaning I don't accept PRs unless I hire you). Features are added because funding comes from somewhere else, but it would be nice to have a second option for users to fund a feature directly.
If you're asking what we benefit from doing this, not much. We could have released proprietary software, but as users of software ourselves, we enjoy having these freedoms, so we don't want to restrict users of the software we write.
Mate, I haven't felt as happy reading a comment on this website as when I read this comment of yours. Keep up the excellent work and I hope you find a lot of success!
