Mirroring is not difficult, I've done it in order to perform code analysis on plugins at scale.
WordCamp expenditures: $2,159,747 (82.81% of total expenses)
Meetup expenditures: $229,571 (8.80% of total expenses)
Total Meetup.com dues: $224,249
Total Meetup Venue rental & exp: $5,322
Operations: $218,685 (8.39% of total expenses) <------ HOSTING PLUGINS/THEMES ETC