A pretty poor article, considering it's from an acm.org blog. It's 2010, and his blog post is based only on two studies, one from 2005 and the other from 2008.

A pretty poor article, considering it's from an acm.org blog. It's 2010, and his blog post is based only on two studies, one from 2005 and the other from 2008. To explain the two years for which he has no information, he quotes "his personal experience". Just a few days ago we read here on HN how one nigerian spammer was netting 40M… (http://news.ycombinator.com/item?id=1174235 http://news.ycombinator.com/item?id=1174235). And as it was said in other comments, if spammers are still sending spam, there has to be a reason.