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 Forget Foursquare: Why Location Marketing Is New Point-of-Purchase With a Projected Outlay of $4B by 2015, Mobile Targeting Is Next Big Opportunity By Kunur Patel, Published on March 22, 2010 26 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.