Comment by mperham

I wrote sidekiq.org starting 8 years ago and blogged about my experiences over time, e.g.

https://www.mikeperham.com/2012/08/26/the-sidekiq-experiment...

I sell closed source Pro and Enterprise focused feature packs for my OSS projects. This is known as "open core".

My first full year in 2013 I sold $85k.

I'm in the millions ARR now.