Is good to emphasize -crack down on sharing of accounts-, is totally correct, in my country as we don't earn good amount of $ we purchase package of 5 accounts so we can share the payment between us; so that means for example that that if Netflix has 3,000,000 15$ that probably most of the cases is a shared account, they are loosing millions of dollars just for that. But if they cancel the 5 devices account, they will be closing the doors to people who use the service without sharing the account.