I do not think this applies to Amazons own listing of your apps. Therefore they can list your app for free, pay you 20% of your list price for downloads of the

I do not think this applies to Amazons own listing of your apps. Therefore they can list your app for free, pay you 20% of your list price for downloads of the app and force you to not make 'free' promotions on other markets with point 9 as you described.