I call bullshit on them, it's simply a matter of monetization. They clearly can't make money with these countries, and therefore are cutting their losses. The price of bandwidth is a LOT less than it used to be (hence all the crazy video sites now) but still companies are faced with how much they want to lose to keep their business afloat every month, as most of these sites operate at a loss.
Sometimes getting huge isn't as easy as it sounds, especially if your business runs on a very tight margin.