Email from Wall Street Journal:
Dow Jones is always concerned when a subscriber comes to this decision; however, for security reasons, your subscription cannot be canceled by email or online.
The Wall Street Journal. Digital Network
... Not all that digital, it seems. Tons of other companies have no trouble letting customers securely sign up and cancel, online. (Methinks it may be more to do with not making it too easy to cancel... ?)
By the way, I told my credit card company (Post Office in the UK, mc) to cancel payments to this rebilled subscription, last month. They said they would "tell the company to stop billing", but I'm still being billed. Whu? Can't the credit company stop payments if the merchant doesn't agree??