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 Facebook at 10: The End of the Beginning (Or the Beginning of the End) Ad Business Is Booming, but Social Network Needs to Keep Distracted Users Engaged By Cotton Delo, Published on February 19, 2014 2 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. Register Now Already a member? Log in.