And it took the "Bowling Alone" Internet, of course:

“This finding was both novel and unexpected,” says Denise Anthony, associate professor of sociology. “In traditional laboratory studies of collective goods, we don’t include Good Samaritans, those people who just happen to pass by and contribute, because those carefully designed studies don’t allow for outside actors. It took a real-life situation for us to recognize and appreciate the contributions of Good Samaritans to web content.”

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