Whatever happened to Groupon? - The Hustle
Groupon founder Andrew Mason is back with a cool new startup
Why is Groupon failing? - Quora
Groupon: The Online Discount Phenomenon » - Knowledge at your fingertips
Groupon Board Names Rich Williams CEO
Groupon founder Andrew Mason's farewell letter to employees – full text, Groupon
Groupon Founder Turned Musician: Andrew Mason's 'Hardly Workin'
Groupon CEO Andrew Mason on Its Quick Rise and Faster Fall
Groupon: from dotcom star to just another coupon business, Groupon
Groupon CEO leaves 'to spend time with family. Just kidding, I was fired'
Most founder/CEOs stay with their companies through IPO