Honestly the best thing about FOSS is that money isn't driving all the decisions. Most open-source projects are built because the dev just wants to build something cool or useful, or they're trying to solve specific problems. Most individual devs don't really care if their user count goes up every quarter.
Personally I've been maintaining a chrome extension for about 10 years, and it's sat happily with about 7000 users that entire time. I built it because I wanted to use it, and I've declined several offers to buy the extension and monetize it.