Facebook 2,200,000,000 YouTube 1,900,000,000 Instagram 800,000,000 Qzone 563,000,000 Weibo 376,000,000 Twitter 336,000,000 Reddit 330,000,000 Pinterest 200,000,000 Ask.fm 160,000,000 Tumblr 115,000,000 Flickr 112,000,000 Google+ 111,000,000 LinkedIn 106,000,000 VK 97,000,000 Odnoklassniki 71,000,000 Meetup 35,300,000