IO Global and Charles Hoskinson have repeatedly explained that Africa is fertile ground for adoption of Cardano.
Having a funding round that focuses on Africa is a win, win, win scenario. Africa wins by getting some backing. IOG wins because the work that they have put into getting projects to the verge of starting in Africa will be encouraged to close the deal. Cardano holders win when there is mass adoption anywhere. The ROI is likely to be high because projects are cheaper to run in developing economies.
The occasional round dedicated to a geographic area might turn out to be a good idea.