My personal favorite example right now, having three smaller children, is amazon's "expiration" of videos installed on their kindles, that we don't find out abo

My personal favorite example right now, having three smaller children, is amazon's "expiration" of videos installed on their kindles, that we don't find out about until we're on a trip somewhere. How do I explain to a kid that they can't watch their favorite movie that worked fine last time, or that they can't download any more episodes of their favorite show because someone decided they could only have 20 videos regardless of storage capacity?