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 Walmart Uses Rivals' Discounts to Fuel New Loyalty Program Behind App to Match Competitor Ad Prices Lies Ambition for Huge Database and New Utility-Driven Rewards By Jack Neff, Published on June 09, 2014 1 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.