This Could Also Explain How Your Blogger CAPTCHA Gets Solved: Chinese prisoners sold to spammers

Chinese Prisoners Allegedly Forced to Play 'World of Warcraft'
www.pcworld.com
One former prisoner says he had to farm virtual gold that the prison guards then sold in the real world for cash.
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Prison guards were reportedly able to sell the virtual currency for up to 6,000 yuan a day, which is about $930 -- not a bad sum. The prisoners, who naturally never saw any of the money, also had quotas to meet. According to Dali, "If I couldn't complete my work quota, they would punish me physically. They would make me stand with my hands raised in the air and after I returned to my dormitory they would beat me."