Lucian Underwood

So it is my understanding that one way to get Experience Keys when this thing is released (is it too late to get a beta key?) is for a user to have Premium Membership. This leads me to the question of what happens if a user loses that premium membership for whatever reason? Does the key become invalidated and the whole experience stops working? Also I read that there would be ways for non-premium members to get keys eventually, is there any update on this?