User engagement techniques, such as sweepstakes, quizzes, coupons, airline miles and loyalty cards have been around for a long time. But in the last few years, such techniques have been fully information-enabled, elaborated and socialized. Engagement is comprised of digital reputation systems, games and incentive prizes, and provides the opportunity for virtuous, positive feedback loops—which in turn allows for faster growth due to more innovative ideas and customer and community loyalty. Companies like Google, Airbnb, Uber, eBay, Yelp, GitHub and Twitter all leverage different engagement
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