There do seem to be "churners" out there subscribing to services only for as long as they need to watch the show they want to see, and I'd guess a wide middle of customers who are at least prepared to cancel if they feel that they're not using the service enough or that they will get better value from an alternative.
To keep these customers, you need to keep them continuously hooked on your programming.
If I was Netflix, and I was optimizing for this type of customer, I would want to have them moving through my content as slowly as possible! My goal would be 2-4 hours of Netflix per week, preferably spread across different days—just enough to ensure they haven't lost interest! Autoplay Next Episode would not be a thing, and I certainly wouldn't release new seasons all at once.
To keep these customers, you need to keep them continuously hooked on your programming.