Document outlining the parts of the Ruby ecosystem and their economics.
Created as part of my talk at the Melbourne Ruby group (rubyaustralia/melbourne-ruby#227, https://www.meetup.com/ruby-on-rails-oceania-melbourne/events/297781313/).
This document is likely wrong, certainly incomplete, and will inevitably be out of date. As per Cunningham's law, I hope to be corrected. Create an issue/pull request and I'll do what I can.