[NearAP]

>> because they actually are from (e.g.)Nigeria and really do have poor English.

This isn't true. English is Nigeria's official language (all Education is in English) and people generally speak English well. Secondly, folks from Nigeria actually use the gist of the article as a flag for filtering out scam i.e. once they open an email with bad grammar, they automatically assume it's scam and ignore it.

[nottorp]

It's funny how native English speakers assume that:

[a] English, which is being used for communication internationally just about everywhere, is only spoken well in the anglo-saxon areas.

[b] Someone who speaks bad English doesn't realize it just because they're in a poor country.