On Friday, social network and recruiting site LinkedIn announced via blog post that it had officially surpassed 300 million members, with 100 million members based in the U.S. alone. Acquiring roughly 100 million users since January 2013, the company noted that much of the growth in traffic has come from two areas: internationally and on mobile. LinkedIn stressed that it was on the verge of its “mobile moment,” meaning that sometime in 2014, mobile use will actually surpass desktop traffic.