Not really the same thing, but makes me think of a behavior I've noticed in myself. Sometimes I'll decide to buy an item or two, and then browse around some more. Pretty soon my shopping cart is filled with stuff I want, but now instead of some minor spending I'm faced with a more significant purchase. I often decide to buy absolutely nothing.

If the store could encourage me to just purchase the one or two things I originally wanted they'd make more money off me.