Read through some of the comments. This one in particular got me thinking:
I wanted to fire back a response at him, but I don't know the actual numbers. If I would have to guess, affiliate advertisers make up WAY more than $20-30M of their ad revenue.
People commenting were eluding to the fact that the lions share of FB's revenue was coming from major brand advertisers buying in bulk. Based on the ads I see, I don't think that's really true. FB is dominated with make money online, diet, teeth, IQ, anti-aging, skin etc etc etc.
What's you're opinion on how much of FB's overall volume comes from affiliate as a percentage? They are targeting around $550M for 2009 (no idea if they are actually even close to that, but that's the target).