Most have not modified their marketing and sales approach to take account of changes in customer buying behavior.

FORBES: Twitter and LinkedIn: Small Biz's Best Growth Tools

We are witnessing a major shift in customer buying behavior and needs: from the Time Value of Money to the Money Value of Time.

FORBES: Time trumps Money in Innovation

As Groupon participates in a greater share of the customer wallet and sees buying behavior across many sectors, it will know customers better than the individual merchants.

FORBES: Those are Groupon's Customers, Not Yours