The problem for the scammers is the response rate is too high. The scammer has to invest time into writing back to the target, so they don't want to spend all day writing letters back.
By peppering the letters with bad spelling, punctuation and case mistakes, they eliminate 99.5% of the population who correctly detect it as a scam. Thus, when they do get a response, the person is much more likely to convert.
It applies to startups if signing up the customer requires cost on the part of the startup. If, for whatever reason, you had to sign up a limited number of people and invest time in each of those people, then reducing your response rate by, say, making the signup process complicated, would allow you to pre-qualify your audience by those actually able to navigate their way through it.
It would have real applicability if you wanted to get a limited market for beta testing.
By peppering the letters with bad spelling, punctuation and case mistakes, they eliminate 99.5% of the population who correctly detect it as a scam. Thus, when they do get a response, the person is much more likely to convert.
It applies to startups if signing up the customer requires cost on the part of the startup. If, for whatever reason, you had to sign up a limited number of people and invest time in each of those people, then reducing your response rate by, say, making the signup process complicated, would allow you to pre-qualify your audience by those actually able to navigate their way through it.
It would have real applicability if you wanted to get a limited market for beta testing.