Bitcoin is a currency of refuge, if Africa has poor people these people will eventually invest in bitcoin, I believe that in a few years all countries will be allowing the use of bitcoin.
South africa have the best economy in the whole african continent. The quality of life in africa is good and stable and can be easily compared to most of the european countries. They are far from the poverty that you are talking about.
A couple of hours ago Business Tech reported, Red & Yellow, a business school in South Africa will be accepting Bitcoin payments for all degrees, advanced diplomas, certificates and online courses with the purpose of preparing its students for career success in a digital future.
The situation is the same as in any other organisation that started accepting cryptocurrencies. It is more likely to be a PR move. Something like "Buy a risky asset on the amount you can afford to lose". I don't think that some of them is brave enough to start getting a significant amount of their income in crypto.