Tapjoy Co-Founders Start Karma Science With $5M Led By Kleiner, Sequoia

Tapjoy Co-Founders Start Karma Science With $5M Led By Kleiner, Sequoia

Co-founders Lee Linden and Ben Lewis (who previously co-founded mobile app platformTapjoy) wanted to do more than just post a note on Facebook when they'd find out about a friend's birthday, engagement, new job or other major event. But actually …

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