Groupon is a smart crowd sourcing promotional business set up 2 years ago in the States.  How it works - the purchasers get a substantial discount on the particular item or experience on offer when enough people participate in the deal.

A review of Gap clothing brand’s Groupon deal can be read here. It looks at the negatives of such a deal especially if a business partner has not done their sums or underwritten the potential redemptions.  

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