Comment by nikitaga

My quite niche open source project broke this threshold last year, via Github sponsorships. Of course, I put a lot of time into it, so it's not "passive income" or even "market rate income", but still, without these sponsorships I wouldn't be able to work on it so much.

The project is Laminar, a UI library for Scala.js https://laminar.dev Yes, you can run Scala on the frontend. The language is nice, the implementation is rock solid, the community is relatively small, yet lively. On Scala.js, Laminar is more popular than even React.js, and is used in SaaS apps, financial services, hospitals, etc.

I opened Github sponsorships three years ago, but overall since the library's inception it took me 7 years of continued work to get to this point.