View Post Ad Biz Tuesday Odds and Ends By Kiran Aditham on Apr. 30, 2013 - 4:24 PM -Valleywag tells us how Foursquare plans to earn ad revenue from check-ins. link -New York-based editorial company Crew Cuts has welcomed Julienne Guffain as lead mixer/sound designer. -Want to know what WPP don Sir Martin Sorrell ...