Ask HN: Anyone making a living from creating open source software?

I wonder what is the sucess factor of making money while working on programming frameworks, JavaScript libraries or any other kind of scripts that you release for free.

Recently I created a jQuery plugin that got me 1000 followers on GitHub and also brought me some donations, but still not enough to compete with a "day job".

I know that large OS projects run through sponsored foundations, but that's another story. My jQuery plugin won't scale that big.