Amazon's reasoning for kodi being a pirate application is due to "there is hardware being sold that bundles software that is used to download illicit software". Where this software is being sold ? Amazon.
So essentially Amazon has no problem for hardware "vendors" selling preinstalled kodi w/ plugins that kodi foundation does not condone or even allow and even is fighting against but they have a beef against having the software itself in their store. Hypocrisy anyone?