Ok, here we go.
http://bbs.gofuckyourself.com/bbs2/banners.js
There is 78 banners in rotation (i know it says 59 but its 78 banners).
$3,000 per banner.
78 x $3000
$234,000/m
Well thats my guess, with the top banner alone GFY coule be making $2,808,000/year.
On top of that, the skins. How many skins per year? Maybe 10? Thats another $250,000/year.