Did anyone figure out how to make money from open source?

Hey. I'm the author of Go Micro. An open source framework for Go development. Over the past 10 years I never managed to find a sustainable way to keep working on this. I bootstrapped with my own savings. Meaning I quit my job and burned what was in a bank account for 9-10 months (most people don't have this luxury). I then managed to find a corporate sponsor (again a friend doing me a favour which most people don't have the luxury of). And after about 4 years of doing that I raised VC funding to try build a product around the framework and turn it into a real company. That went very poorly. So I think open source sustainability is hard and from first hand experience I never managed to make it work. I'm curious to know if anyone figured it out? We know elastic, hashicorp, redis, etc. But did anyone make it work in a smaller capacity? I even remember the story of Mike Perham with Sidekiq and doing like $1m in sales solo. But again I never managed to make any of it work myself.