Ask HN: Who has turned a side project to full time gig? And at what revenue?

Side projects seem to remain side projects as long as they don’t make a lot of money. But I think just asking about side project is not really useful if you really want to know what’s the chance that a side project could find something bigger.

I’m curious to know who here has had a side project transitioned to a full-time business, and at what revenue numbers, if you’re willing to share, the transition occurred.