But it breaks down when that business fails to increase it's capacity. Case in point: I used groupon once for a restaurant and the experience was horrible. The restaurant was completely unprepared for the number of people showing up. On paper I got $40 bucks worth of food and service for $20 bucks, but the experience was so bad I wish I had stayed home and saved my $20 bucks.
In my situation the restaurant and Groupon dropped the golden football.
From a business perspective the failure to convert into repeat business has long known to be a problem, but now having experienced GroupOn as being a second class experience I simply won't be using it again.
In fact, the limited experience of GroupOn in our household has been such that they've successfully made us dubious of the entire offers/group-buying thing and leave us preferring to get personal service and avoiding the offerings of GroupOn and all of their competitors.