Even with those three products, I still find it hard to believe they'd be one of the most profitable companies in the world. If you look at the top 50, it's filled with mainly oil companies, banks, and hardware producers (Microsoft being an exception). Google crept in at 47 due to AdSense, which I think Facebook could overtake.

I'm not saying Facebook cannot be wildly profitable, I just don't think it'll come close to the top 10 (what I'd consider to be "the most profitable companies in the world").