This is one of the best businesses I have heard of. Even 6-7 years back, Sidekiq was grossing $80k/month [1]. I imagine it must be much more now. No servers to maintain, no employees, minimal support work and Mike has the complete freedom to work on updates whenever he prefers. Almost entire revenue minus payment processing costs must be profit. Imagine making $1M / yr working only 10-20hrs per week (Don't wish to pr…
Mike has built a system that's rock solid, and he doesn't twiddle around with it willy nilly. He keeps it super stable.
The people paying for it (I'm one of those people) are paying for the reliability, in addition to the features.
Mike's also managed to find a real sweet-spot with the features he holds out for Pro/Enterprise. The stratification is just right to nudge you up, but it always feels like you're getting a good deal when you pay.