The new method of attack reflects the evolving sophistication and efficiency of top spamming groups, a community of people who support each other by trading intelligence, products and services.Spammers are refining and extending the collaborative environments of the open source community. They are now masters at using the internet to share and develop techniques. They behave very much like "strategies in a game"; where the game follows the rules of natural selection and adaptation.
An individual spammer is a feeble thing. A community of collaborating spammers is a terrible weapon of great intelligence.
Hive mind. Market economy.