You’ve read all of your free items this month. To register, get added benefits and unlimited access to articles, Become a Member. Already a Member? Sign in. Advertising Age Article Abstract Why LinkedIn Is the Social Network That Will Never Die Facebook May Be Exploding With Its Promise of Fun, but People Need Professional Presence, Too By Irina Slutsky, Published on December 06, 2010 17 Want more Access, Content & Connections? Upgrade to Membership. We are glad you are enjoying Advertising Age. To get uninterrupted access and additional benefits, become a member today. Become a Member Already a member? Log in.