The bigger problem is its basically an "unloyalty" program for the businesses. Why go back to the same massage therapist and pay full price? I'll just wait until the one down the street runs their 50% off deal in a couple weeks.
That may not be the worst of it - the people will wait for you to do a deal. It seems likely every new customer you gain this way will only purchase at a discount, Groupons look like ant powder to me.
this, and highly unconventional approach regarding the IPO by andrew mason (not remaining quiet during pre-IPO quiet period, recent executive reshuffling), as well as questionable sustainability, will probably delay the IPO for several months. i, as i'm sure many others, are curious as to what the company will look like in a year.