Here's a look at the monthly active user (MAU) count for seven of the major social networks.Facebook: 1.59 billion (December, 2015) ... Instagram: 400 million (September, 2015) ... Twitter: 320 million (March, 2016) ... Google+: 300 million (October, 2013) ... LinkedIn: 100 million (October, 2015)More items...
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