The real reason is "our profit margins are currently spread too thin" but they can't say that because it'd make Amazon look really bad in terms of PR. Amazon is

The real reason is "our profit margins are currently spread too thin" but they can't say that because it'd make Amazon look really bad in terms of PR. Amazon is currently looking to cut stuff that costs Amazon money and something that reduces their tax liability is also bad for PR if it means that Amazon pays little or no taxes.