Facebook expands 'I'm a Voter' feature to international users - Los Angeles Times
Hundreds of millions of Indians had their fingers inked blue to show they voted in recent nationwide elections. According to Facebook, 4 million of them clicked the "I'm a Voter" button to broadcast their participation on the social media network.
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It's not just social media fluff. A study published in Nature, a scientific journal, estimated that more than 340,000 voters turned out to cast their ballots during the 2010 midterm elections as a result of seeing their friends' "I'm a Voter" Facebook status.