Breaking News (and Making News): Twitter Surges 131% in March to 9.3 Million U.S. Visitors! (comScore Voices) 
Twitter may not have figured out how to monetize, but it continues to grow its audience at a jaw-dropping rate. Its visitor base swelled by 131% in March to 9.3 million U.S. visitors, according to comScore, adding more than 5 million users in a single month.
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