The current model tries to fight back against this by having a release or "broadcast" schedule so the latest season of a show isn't binge-able. I also think the whole mess relies pretty heavily on FOMO with the current fandom and the desire for a spoiler-free experience. Otherwise, it's much cheaper to permanently stay a year or two behind everyone else well after full seasons are released (and the reviews are in).
If I'm right, we'll eventually see more draconian policies to "lock in" subscribers somehow. (I'll leave it at that - please don't give them ideas)