It made us cry, too. It was very unexpected and an early culmination of a lot of hard work.
Regarding our financials, Quincy has written about this on Quora: https://www.quora.com/How-does-free-code-camp-make-money/answer/Quincy-Larson?srid=C2lT
You should follow him for answers to other questions you might have about the community.
As far as volunteer management, we use Trello for everything.