It was thoughtful of you to have responded. However as a Nigerian I find it offensive for you to conclude that most of these emails come from countries like Nigeria. Scammers are more sophisticated than most people think. The US is filled with various Ponzi Schemes disguised as multi level marketing companies. The email you received might come from any country. That you still use simplistic stereotypes to make meaning into things like this might make you fall for an actual scam from your backyard. Bernard Madoff defrauded millions of Americans and he has never been to Nigeria.