I think the logic may have gone like this:

"If it ain't got no dead president on it then it ain't no damn money!"

I like to avoid giving credence to any negative stereotypes of Americans, but sometimes the internet makes that so very, very hard.

It's been primarily speculative, but many people have suggested that Facebook's Ad platform works because American companies can easily target Americans because they know something about the market they're trying to hit.

I'm probably wrong in my assumptions, but I would think it would be pretty difficult for some targeted ads to work in foreign countries. I don't have a bias or anything, I'm just summarizing the feeling I've gotten from reading numerous reports online.

Here's a thread about how Facebook's costs are growing: http://news.ycombinator.com/item?id=445630