(4-traders.com) TORONTO, ON -- (Marketwired) -- 05/17/16 -- The Keller Fay Group, an Engagement Labs (TSX VENTURE: EL) company and creator of TalkTrack®, the only data system to measure the totality of word of mouth (WOM) conversations -- both online and offline -- has extended their work with a major US national advertising agency, providing...http://www.4-traders.com/ENGAGEMENT-LABS-INC-22110698/news/Engagement-Labs-Extends-Contract-With-Major-US-National-Advertising-Agency-22371535/