Look again, Patrick.<p>The windowing only would apply to the "old terms of sale", where Amazon can arbitrarily set the prices.  Macmillan wants new terms, with prices to be set according to a sliding scale.<p>"Windowing" is being used as a threat here, to push Amazon to the new terms-- it's not what Macmillan wants.  (Amazon in turn retaliated by opening the ultimate window-- delisting Macmillan altogether.)