This doesn't really mesh with SaaS economics, or in this case how Netflix spends billions on producing their own content. A set of subscribers that don't use the service is locally maximized but has a lower lifetime total value. It is much easier to model & optimize your LTV with given costs (ex: assume the user watches 24/7) and then figure out "how do I make a user watch Netflix 24 hours a day?" than it is to solve "how do I grow my constantly churning user base?". Keeping customers is much less expensive than winning new ones.