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 What Top Brands, From Amex to Warby Parker, Are Doing at SXSW Chevrolet, PepsiCo, Kraft on What They're Planning and Why They're There By David Teicher, Published on March 12, 2012 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. Register Now Already a member? Log in.