From 10 Hours a Week, $10 Million a Year - New York Times
Mr. Frind has refined a formula for analyzing customer feedback and arriving at a determination of whether a given forum post is spam and should automatically be deleted. He has also devised some new software twists that enable him to offload work to his customers, letting users review the photos that are uploaded to the site.Mr. Frind says that close to 50,000 new photos come in every day, each one of which needs to be checked to verify that it is an actual person and that it does not not contain nudity. The work would be costly if Mr. Frind relied on a paid staff to do it.
Fortunately for him, there seems to be an inexhaustible supply of humans eager to look at pictures of other humans, and Mr. Frind taps his customers to carry out the reviewing, gratis. Some have made it their principal pastime. Among Plenty of Fish’s volunteers were 120 who last year evaluated more than 100,000 images each. He explains his volunteers’ enthusiasm for the work as an expression of gratitude: “Lots of people feel like they want to give back to the site because it’s free.”