I may not know in other African countries but you see in Nigeria we have lots of gamblers. No joke, the numbers are increasing every single day both in online casinos and in local betting shop.
What you think as the local betting shot will likely still be since as online, unlike landbased casinos. I mean if you are referring to the betting agents that people when to place bets. This is different from gambling directly with the casino offline.Also those countries are very rich but if you check the my posts above, if it is online gambling, we should be there.