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 GroupM Striking Upfront Agreements With Networks to Use C7 Big Shift to Paying for Viewing Up to a Week Later Instead of Only Three Days By Jeanine Poggi, Published on June 02, 2014 0 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.