I can no longer edit my post, but here's an interesting source: "Spammers Pay Others to Answer Security Tests"[1] choice quotes: "spammers are paying people

I can no longer edit my post, but here's an interesting source: "Spammers Pay Others to Answer Security Tests"[1] choice quotes: "spammers are paying people in India, Bangladesh, China and other developing countries to tackle ... captchas" "attractive enough to lure young people in developing countries where even 50 cents an hour is considered a decent wage. Unskilled male farm workers earn about $2 a day in many parts of India. " "students typically work two and a half to three hours a day from their homes and make at least $6 every 15 days" "Another operator in Bangladesh who goes by the screen name Workcaptcha on Freelancer.com boasts on his profile page that his firm has 30 computers, up from just five a year ago. Three shifts of workers allow the operation to hum 24 hours a day, seven days a week" [1] http://www.nytimes.com/2010/04/26/technology/26captcha.html?src=me&ref=technology http://www.nytimes.com/2010/04/26/technology/26captcha.html?...