He does mention, somewhat off-handedly, that the lack of email makes password recovery harder. (Presumably impossible without some other communications channel like a phone number.)
And you really need to be able to recover account access for a paid subscription. It's probably also reasonable to assume that if someone is going to give you a credit card number and address, they're probably OK with giving you an email.
And you really need to be able to recover account access for a paid subscription. It's probably also reasonable to assume that if someone is going to give you a credit card number and address, they're probably OK with giving you an email.