Oh mate, I do understand that you see the potential of cryptocurrency gambling/betting in Africa since they are still at the stage of development. Well, here's what I can tell about it since it's South Africa, I would not recommend anyone to establish a gambling platform there since gambling is I can tell a profitable business that is sustained by the greed of the gamblers. If I were you, I would start to establish a company that will provide jobs from that specific country and at least give them a 0.xxxx01% of GDP/growth of the economy. Sometimes it's not about the money, it's about the vision that is clear to help others.
I think future of gambling is very bright in Africa and Asia. You will not find as many casino as in Europe and USA. Africa and Asia market is very under development in terms of gambling and casino, although in some countries the ratio is quite good also.
Development of casino in these continents will be a good business idea and can give a lot of money in return if implemented properly.