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 Tesco Acquires Social-Marketing Firm BzzAgent for $60 Million U.K. Retailer Buys Into Startup's 800,000 Product-Sampling Volunteers By Edmund Lee, Published on May 23, 2011 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. Register Now Already a member? Log in.