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 How Much Are You Really Worth to Facebook and Google? Privacy Tool Spitballs Using Publicly Available Figures and Individual User Data By Cotton Delo, Published on May 07, 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. Become a Member Already a member? Log in.