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 MediaVest Is Looking for Brand 'Swingers' Media Buyer Tests New Metric That Rewards Shows With High Number of Product Switchers By Andrew Hampp, Published on July 01, 2009 2 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.