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 Scan One, Get One Free: Digital Deal Player Expands to Walmart, Target SavingStar Program That Tracks Shoppers Across Chains (With Or Without Loyalty Cards) Adds 30,000 Stores By Jack Neff, Published on July 07, 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.