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 Burger King Global Sales Up in 2013, But North America Down Fast Feeder Blames Polar Vortex and Increased Value Competition By Maureen Morrison, Published on February 13, 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.