1. Apple and Amazon will add language to their Terms and Conditions stating that regardless of the phrasing on their websites and apps, access to the media that customers purchase will be revoked if their account is terminated. And since it's in the agreement, it's binding: in general, you can't sue to get out of a contract just because you discover you don't like the terms later on. (Whether or not you actually read it before agreeing to it.)
2. Apple and the class action attorneys will settle this out of court. Apple will pay the attorney fees and reimburse the lead class member for the value of the media he "purchased". Everyone else who joined the class action as a member will get a $5 credit to their Apple account.