Break Down of 2015/2016 Social Network Demographics (INFOGRAPHIC) Who's Really Using Facebook, Twitter, Pinterest, Tumblr and Instagram in 2015? Social's biggest network isn't dying, but it is getting grayer. social-media-users-02-2015 (1) Infographic provided by AdWeek Will NesbitNovember 2, 2015 Facebook0 Twitter Tumblr 0 Likes