StumbleUpon is a tool that recommends content to users by the amount of 25 million people use StumbleUpon as a source of information and entertainment. In addition, the type of business, media and publications have also used StumbleUpon to brand promotion of them being bought by eBay during May 2007, but 2 years later, it was bought back by Garrett Camp, Geoff Smith and a group of investors and thus making the return of these startup e Reed times.
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