In its own twist on letting the punishment fit the crime, AOL is disciplining a spammer who helped the company win an antispam lawsuit by giving away a substantial stash of loot purchased with profits from his illegal business.

Calling the giveaway the AOL Spammer's Gold Sweepstakes, which runs until 19 August, AOL will award nearly $100,000 (about £55,000) in cash and gold bars, as well as a loaded 2003 Humvee H2 vehicle, to its members and others who participate in the giveaway.

The prizes are part of assets recovered from spammer Braden Bournival in the first lawsuit AOL filed under the federal CAN-SPAM act of 2003, according to the company. AOL was awarded a $13m (£7.2m) judgment in the suit.

AOL members helped in the search for spammers named in the suit by using a "Report Spam" button to help AOL and detectives find those responsible. The Sweepstakes is a way for AOL to show its appreciation for that help.

"To say 'thank you' to AOL members for their help in tracking down this lawbreaker, AOL is giving these ill-gotten goods away to members through the AOL Spammer's Gold Sweepstakes," the company said.

AOL members can enter the sweepstakes at AOL Keyword: Spam Sweepstakes; non-members can enter at Entrants can win daily cash prizes as well as the Hummer and about $85,000 in gold bars and cash.

Though the spammer whose former property is being given away aided AOL in its quest to identify other spammers involved in the case, the company said it still felt he needed to be punished.

"The spammer's cooperation, while helpful, didn't absolve him from paying for the harm he caused AOL members, and under the US CAN-SPAM laws, AOL was able to seize everything the spammer made during his 'career'," AOL said.

AOL also had an ominous "don't even think about it" message for other would-be spammers who may be interested in plaguing AOL users' in-boxes with unwanted email.

"[This sweepstakes] also serves as a message to anyone thinking of making a living sending spam to AOL members: AOL will find you and sue you," the company wrote on its site. "And AOL will do everything it can to make sure its members end up with any money you made as a spammer."

Earlier this week, Microsoft also won a big settlement in an antispam lawsuit filed two years ago against the self-proclaimed "King of Spam", Scott Richter.

On Tuesday, Richter, who at one time helped distribute more than 38bn unsolicited emails a year, agreed to pay $7m (£3.9) to the software giant. He also said he would not send any more unsolicited emails.