Anyone who gets large amounts of spam gets their fair share of penis enlargement offers. One would assume that the purpose of these is to make money, but another possible, darker purpose comes to mind. The folks behind this spam are really interested in putting together a list of the people who respond positively to these ads. They will then at some point reveal this list to the world, hoping to embarrass untold numbers of men by pointing out "Hey, this guy has a small penis he wants to enlarge!"
Ridiculous? Hey, its no more ridiculous than most conspiracy theories. And if it takes off you read it here first.