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Whrrl was a social location-based game developed by the Seattle-based company Pelago Inc.Whrrl had a recommendation engine that uses algorithms and users’ votes to surface relevant recommendations.On June 30 2010 Whrrl launched its Society Rewards Program designed to close the gap between a brand’s online social media and real-world presence with its first partner Murphy USA Oil.Groupon announced that it had purchased Whrrl on April 18 2011.