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 Books $1.86B in Advertising; Muscles In on Google Turf New Estimate From eMarketer Shows Majority of Social Network's Ad Revenue Comes From Small Businesses By Edmund Lee, Published on January 17, 2011 18 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.