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LinkedIn passes the 500 million registered user mark

On the heels of rapid improvements across much of the platform LinkedIn now has 500 million registered users on board, one analyst says it could double or triple its reach under Microsoft.
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Matt Kapko has been writing about technology since before the dawn of the iPhone, and covering media well before it was social. Matt lives with his wife in a nearly century-old craftsman in Long Beach, Calif. He can be reached on Twitter: @mattkapko or by email: matt@kapko.co.