The last mod payment resulted in the mods getting a total of 0.1844BTC, and was sent in the middle of March. I looked at the previous ad auctions going back a month (based on the end date) prior to the mod payment being sent, and the forum received a total of 0.325BTC from selling ads. So it looks like last month, the forum spent about 56% of their revenue on mods. At current prices, that leaves about $8100 to pay for hosting, and any other expenses the forum may incur.

I am not sure how much hosting costs the forum per month, but it is probably a decent amount based on the amount of traffic it gets.