Porn Dominates the Spam Battlefield
An anonymous reader writes "New York Times has published an article that explores the economics that control what type of spam shows up in your inbox. The study was done by CipherTrust and shows that porn spam is 280 times more effective than spam advertising pharmacy drugs. Paul Judge offered the following towards an explanation: 'If you look at some of the oldest and most successful forms of business on earth, they revolve around sex.'"
If i'm not mistaken the img's from spam isn't included in the email itself, but it's on a webserver, so if you simply count the number of send spam vs number of unique visitors to those img's you have the delivery rate, check those ip's against the ip's of the people following the link and you not only have the click-through rate, but you also have the number of people who click-through more then once ;-)