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 Walmart Pitchman Mike Rowe Takes on Unpaid Work Defending Retailer on Facebook Voiceover by 'Dirty Jobs' Host Spurs 3,900 Comments on His Facebook Page By Jack Neff, 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.