Ottawa will only process a limited number of study permit applications from institutions in each province. If an application is refused because officials don’t believe the applicant is genuine or has enough money to complete the study, that potential enrolment spot will be wasted.
“You’re going to see decreasing numbers of African students coming to Canada, not because they’re not interested. It’s just because the institutions are not going to use their quotas for countries with lower visa approvals.”
https://archive.is/zKGa6