These are much more specific things that users are interested in, says CEO Garrett Camp.

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StumbleUpon founder and chief Garrett Camp wrote about the news on his Twitter account earlier.

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The company was founded in 2009 by Garrett Camp and Travis Kalanick.

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Uber was founded by an entrepreneurial group including Kalanick, Garrett Camp (CEO of StumbleUpon) and Oscar Salazar (CEO of CitiVox) to remedy the lack of cabs at 2 a.m. in San Francisco.

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