I always thought these types of services didn't go after account sharing as a form of flexible pricing. The users who are OK paying $10/mo pay that. The users who wouldn't pay $10 share an account and get a slightly less convenient service.
Are their profit margins so tight that a 1:2 paying non-paying user loss ratio is a net win?
probably it's stupid on their part, but on the other hand users cost them money too. If you have two users on one account - one watching from 8-12 in the morning, and the other from 4-10 in the evening, if you get rid of one of them you are streaming 4 hours less for the same price. So I guess this kind of thing must also affect their calculations on this matter.
Are their profit margins so tight that a 1:2 paying non-paying user loss ratio is a net win?