To be fair, he said multiple billion in profit not revenue. Still has some ways to go.

The story was about revenue: http://news.ycombinator.com/item?id=689712

It's hard to believe that a fb board member could make more accurate revenue predictions than random people with strong opinions commenting on HN ;)

There's a second bet in there:

gojomo: "To be specific, I will bet $100 that Facebook's annual revenue will reach $2 billion/year by 2014. Do we have a bet?"

jacquesm: "absolutely."