3 spam posts in one weekend? Why not?! I've often wondered abut the economics of email spam. Clearly it was making someone money, otherwise we wouldn't get nearly so much. So how much does spam make? Via Schneier, the answer is not much, but enough.

Spam is all about economics. When sending junk mail costs a dollar in paper, list rental, and postage, a marketer needs a reasonable conversion rate to make the campaign worthwhile. When sending junk mail is almost free, a one in ten million conversion rate is acceptable.