And that's true in open-source too. For example the Brackets code editor project (which I work on sometimes) has over 250,000 users, yet there's only about a do

And that's true in open-source too. For example the Brackets code editor project (which I work on sometimes) has over 250,000 users, yet there's only about a dozen people who regularly respond to bug reports, IRC, forum questions, etc. -- half of whom are volunteers. That's a much higher ratio than 1,650:1...