How will Groupon keep users buying?

How will Groupon keep users buying? – “Behind dazzling growth story, Groupon struggles to keep customers clicking” http://ow.ly/5bt5E

Groupon faces some tough critics

Groupon logo.

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Groupon faces some tough critics – “Some question Groupon’s value after losses disclosed in IPOhttp://ow.ly/59kW2

Daily deal darling Groupon files for $750 million IPO; here is their prospectus

Daily deal darling Groupon files for $750 million IPO; here is their prospectus http://ow.ly/58RWy