[XorNot]

>I disagree, most non-US residents in the world don't even have bank accounts. Not to mention, the US and Canada are a huge market with a terrible banking system that refuses to modernize.

Didn't Nigeria, specifically, just issue national ID cards which are implicitly tied to being Mastercard direct debit cards as well?

[aianus]

I wonder how many merchants are able to accept Mastercard in Nigeria. More likely people are using them simply to deposit or withdraw cash. Remember, before square and stripe it was an expensive bureaucratic nightmare to accept payment cards even in Canada or the US.