Build a garden first, then tend it properly, then let the crowds in. Hopefully, the rules of engagement are clear and remain well kept.
According to Groupon they’ve been so successful that highlighting just a single deal a day is hampering their growth (and since Chicago just added its millionth subscriber, I’m wondering what unhampered growth will be), so soon merchants will be able to create their own deals, whenever they wish, and have a virtual storefront just for Groupon users. Here are the features highlighted in the post: