The ineptitude of the spamming is actually a sign of eptitude -- they intentionally include the signs you look for because you're a waste of their time. They have figured out the precise line to walk where bad marks like you avoid them but easy marks like him engage.
I've heard that's the thinking behind the infamous and infamously 'reeking of scam' Nigerian Prince email scams too. And the fact that people still fall for them shows it's a seemingly a strategy worth pursuing.
[But a discussion here on the ridiculously obvious scam that people fall for all the time is probably too off-topic --even for HN!]
PS: Upvote for "eptitude". Even if it's not a real word, it ought to be. [And I'm not going to spoil things by looking it up]
I suppose that makes some sense; anyone who will fall for the most blatantly obvious scams will probably be pretty gullible, much more willing to hand over money.
Intentional or not, they have figured out a kind of clever selection bias.
