I'm sorry if I misunderstood,

I see

Income:
Donations: $ 114.78
Ads: $ 419,671.12

and

Expenses:
Fees & services: $ 10,886.03
Forum software project: $ 1,151,595.23
Other contractors: $ 39,297.05
Mod payments: $ 104,575.79
Bounties: $ 505.30

This means that the money to cover the expenses of the forum comes from advertising and donations?

I see that Forum project software cost $ 1,151,595.23 in 2014. this means that in 2016 the cost to keep the forum will be higher.

As the forum intend to pay many expenses this year?

Who are the developers forum? are members of the staff or theymos program alone?

Excuse me for asking so many questions I'm just curious.