Why are Nigerian scams filled with typos and grammatical errors? The smug may think the scammers are just ignorant, but the most convincing reason I've heard is that the typos and errors are there for a reason - they act as gatekeepers. They filter away the smarter or at least more skeptical targets and leave behind the truly gullible.
My partner is obsessed with elaborate indian/nigerian scams - his version of "fun" youtube rabbit holes. LOL! It's fascinating that there is a whole method to all this madness!