Most all of life is acting in the presence of imperfect or incomplete data. I welcome any contributions to my imperfect knowledge you may offer, however.
Groupon is no longer the same company it was 4 years ago; you might be biased by being anchored to a $20 IPO price, which you should actually blame on the investment "banksters"; thousands of merchants are grateful for the relationships they have with the company and continue to maintain those relationships; at least one YCombinator company has been purchased by Groupon. Calling it a "scummy greater fool play" is not appropriate in light of these facts.