Groupon CEO Andrew Mason to Stockholders: OS for eCommercehttp://thenextweb.com/insider/2012/05/07/in-letter-to-stockholders-groupon-ceo-explains-why-he-wants-to-move-fast-on-a-bumpy-road/ by iProject • 14 years ago 10 2 14 years agoTHthenextweb.com