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Re:Hansel and Gretel Marketing - How Barneys Entices Custome... by nandemo on Sunday June 21, 2009 @04:02AM (#667224)
This and other sales tricks are explained in Cialdini's "Influence: The Psychology of Persuasion".

I really like that book because it made me feel more conscious about those tricks, even though it's mostly stuff "everybody knows".

Re:Hansel and Gretel Marketing - How Barneys Entices Custome... by sqyttles on Saturday June 20, 2009 @11:53PM (#667093)
"The tactic works pyschologically to make her feel indebted"

I've had similar feelings toward free offers and I'm sure it's a common occurrence.