Somewhere... probably now happily retired, is the marketer who came up with the idea of Black Friday.
But what started out as a simple marketing idea has grown - as these things will, into an uncontrollable monster of a day for marketers.
Here's what you've got... one day. One day during which you slash your margins and hike up your ad spend to try and to beat your competitors to be the trader making the least money on every sale. He who makes the least wins. And the more of the less you make the better... somehow.