Sub numbers? How would you exactly relate sub numbers vs shows? Try and graph how many people only watched 1 show, or watched that show right after joining?
1 - How much minimal time does a consumer watch Netflix to re-subscribe? 2 - How much content spend is necessary to achieve that minimal viewing time?
Everything else is waste and lost margin.
Though maybe there is some core who just doesn't bother cancelling and resubscribing because it's become a hassle.