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 In Tracking Users, Pinterest Lays Groundwork for Ad Business A 'Do Not Track' Option Is Now Also Available in Account Settings By Cotton Delo, Published on July 26, 2013 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.