The indictment alleges that Ralsky's spam gang "tried to send spam" through botnets and engaged in a "pump and dump" stock scam for Chinese companies. The Detroit Free Press's coverage reports: "Prosecutors described Ralsky, 52, of West Bloomfield, as one of the most prolific spammers in the nation. Until 2005, when federal agents raided his home and seized his computers, his operation sent tens of millions of unsolicited email messages daily to Internet subscribers, hawking everything from sexual enhancement drugs, weight loss products and worthless stock, the government said. In the summer of 2005 alone, prosecutors said, his operation generated $3 million."
The DOJ press release is here.