There's also the factor of brand recognition - "Groupon" is becoming the "Kleenex" of daily deals. Having worked for another deal site which had an entirely di

There's also the factor of brand recognition - "Groupon" is becoming the "Kleenex" of daily deals. Having worked for another deal site which had an entirely different model, every time I explained it to people, I had to make clear the differences between it and Groupon. Any new player, besides the technical and sales aspects, would be saddled wtih the burden of differentiation.