Man did I pick up a good book right now: The Yahoo Boys: Love, Deception, and the Real Lives of Nigeria's Romance Scammers
A journalist from Spain went to Nigeria and located a few Nigerian scammers that run all of these romance/gift card scams and wrote about who they are, how they get into it, how they live etc. It's a bit unreal how it's almost like a sport to these guys. Very fascinating.
It's says unreleased but somehow my library had this /shrug