Spam gets smarter

A while ago I looked at the spam mail I was getting into my Inbox. Take a look at some of the Subject lines. They have got a bit smarter over the time. Rather than bombarding the mail with typical words like “sex” “penis” “vigara” etc. They are crafted as an e-mail with some really neat proposals to invite potential customers.
I was also thinking, how many people on the Internet are unaware about spam and would be inclined to open, read and maybe even respond to such e-mails. Have you ever done it? Do even the “sex-addicts” ever buy something from these e-mails?