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 News Corp.'s Private Exchange Digs a Moat Against Ad Tech Companies Publisher Aims to Ward Off Audience, Revenue Parasites By Tim Peterson, Published on August 21, 2013 4 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.