The numbers in Asia and Europe are growing significantly, but keep in mind at the time of this writing that the US accounts for the majority of internet traffic. South America and Africa are not even a blip on the Radar Screen.
Lets look at economics.
Obviously, this is a serious consideration in any overall business model when it comes to online casino revenue. The IP address is like a phone number. It tells other computers exactly where you are in the world. For those individuals, the game would operate similar to casino software bought in a computer store.