If you’ve got deep pockets, but short arms, you’ll love Groupon.com. Credited as the inventor of social commerce, Groupon uses the the power of bulk buying to offer one-day-only deals to anyone who signs up for its dozens of local editions at cities across the nation. So does it work? Well, according to Groupon, more than 3 million digital discounts have been purchased, saving subscribers some $149 million. Meanwhile, the venture capital firm that helped put Facebook on the map recently invested $30 to help Groupon expand.

[Groupon]

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