Whoa! I'm blown away that Sidekiq has enough money in the bank that one of their sponsorships is $250k/yr!
Sidekiq the company (actually ContribSys) is just one guy: Mike Perham.[0]
I listened to an interview with Mike a few years ago, and he seemed like he had an amazing setup. He was making about $1M/yr with no employees, just him selling code and contributing to open-source. I don't think he even has servers to keep online.
According to this podcast from 2023, he's now making close to $10M/yr in revenue and is still just running the whole thing by himself.[0] Great life for a solo dev founder!
[0] https://ruby.social/@getajobmike
[1] https://www.startupsfortherestofus.com/episodes/episode-661-...