12/14/2010 11:26 am ET Updated May 25, 2011

From Groupon To Groupoff: How Aggregators Will Change The Group-Buying Game

I write a lot about Groupon and the many Groupon clones because, well, I find the group-buying phenomenon all quite fascinating. So you can imagine that it would take a lot to drive me to the brink of Groupsanity. But here I am, and this weekend I started doing a very bad thing. I began unsubscribing to all the various group-buying sites I had subscribed to.

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