Check the article link below for a timely Groupon reality check (via Mitch Kapor)
The most prominent group buying site, Chicago-based Groupon, has 2011 revenues estimated at between $3 billion and $4 billion. Google last December offered to buy the firm for $6.4 billion. After the acquisition was unsuccessful, the search giant launched its own venture, Google Offers. Facebook, too, is entering the space, joining the roughly 500 group buying sites that have emerged worldwide.
But much of that "wild exuberance" is miscalculated and could bring ruin to investors, warns Wharton marketing professor David Reibstein in an interview with Knowledge@Wharton. Taking Groupon as a case in point, he says the industry's current growth rates are unsustainable. Also, he faults the site's business model, arguing that it will leave customers, suppliers and investors disenchanted.