Spammer must pay only about ten dollar for one million emails. That said matt Sergeant, anti-Spam boss with Symantec MessageLabs opposite Darkreading.com. The unbroken growth of Spam exclusively comes by the development of the underground economy in the net. With the small prices, which would have to pay Spammer for a renting of offering nets, be sufficient a minimum answer ratio, in order to obtain with the Spam dispatch profit.