Sure, but if you want to make money from your work, it's a bit of a requirement. Gargon, the author of Mastodon, is making good money from his work on Mastodon. I'll bet folks would make money off Redis if they build a LibrePay or Patreon for it too. Now if you're a random small OSS author trying to become an OSS rockstar, then nobody would contribute.
Well, the question was what's wrong with these platforms with regards to OSS.
You can't just provide software that 1000s of people use. You now have to be creating some story around it on Patreon or whatever, have a way to get people to patreon or your website in the first place, which will only take away time from your side project.
Numbers just don't add up. You can perhaps expect $50/month with those number of users if you really, really tried and spent countless hours on propagation. That's like 1-2 hours of work in a real job.
For a cli tool distributed in major linux distros you don't even have a way to get people to your website, because mostly just packagers will go there and some people with exotic preferences who build from source, which is a tiny minority.
