How to Draw 22 Million Visitors to Your Website

Michael Edwards
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Step One: Be Human

In a world of impersonal web services, Pandora prides itself on its human ingenuity. From the very beginning, Westergren insisted on having real live human beings inform each recommendation the site makes. Analysts rate a user's likelihood of enjoying a song based on a 10-point scale that takes into account as many as 400 attributes such as lyrical content, harmony, and rhythm. "It's profoundly unscalable," Westergren told Inc. in 2007. "Our method is really absurd in that regard."