Something similar happened when restaurants started charging for (previously free) bread. There's a good podcast & article at http://freakonomics.com/2014/06/1

Something similar happened when restaurants started charging for (previously free) bread. There's a good podcast & article at http://freakonomics.com/2014/06/19/theres-no-such-thing-as-a-free-appetizer-a-new-freakonomics-radio-podcast/ http://freakonomics.com/2014/06/19/theres-no-such-thing-as-a...