I think you're joking on that one. I don't think the salary has anything to do with the number of users on AG.
Seeing as how the amount of users is AG's amount of business, if they get less users for a long time they might experience budget cuts or vica versa.
On the topic of payment, many of the admins are web developers and web developers tend to make around 85,000 USD a year. A game developer purely devoted to making flash games is an uncommon job so it's hard to guess the salary they are making.