Sounds fun:
In May 2010, Groupon created a challenge to live off Groupons for one year. The contestant Josh Stevens traveled throughout the United States and to the United Kingdom and purchased all food, drinks, travel, entertainment and more from Groupon for 365 days. At the end of the year, he received a prize of $100,000
It's almost like you haven't been paying attention to a single thing about Groupon for the last couple of years.
You could start here (http://en.wikipedia.org/wiki/Groupon#Reception) but somehow I think that wouldn't matter to you.