The bad guys won...
Wired News: Under Attack, Spam Fighter Folds A startup whose aggressive antispam measures drew a blistering counterattack from spammers two weeks ago that brought down the company's servers along with a wide swath of the internet is shuttering its program targeting junk e-mailers.
The spammer's business works because they can spew out millions of emails for essentially no cost. Given the low cost the business is profitable if only a tiny fraction of the volume of spam generates a response. Clearly a very profit from spam, with the very many burdened by wasted time and extra cost. Nasty business.
The spammer's business model breaks if each spam email sent out generates a reply.