Upworthy Goes Viral by Optimizing Optimism

Forget microtargeting—Upworthy takes social media a step further
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Doctors gave Zach Sobiech bad news just after his 17th birthday last year: His rare bone cancer had progressed so far that he had only a year to live. In December, Sobiech posted a music video of Clouds, a song he wrote and recorded about struggling with the disease. He became the subject of a short online video documentary, which garnered tens of thousands of views after being featured on FoxNews.com and People.com. Sobiech died on May 20.

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