[mindslight]

It certainly changes the burden of notification. A company can setup many hoops for canceling, forcing you to go through some asinine phone tree and drone script to stop charges to your card. Whereas lacking an established payment channel, they can no longer play dumb if you eg send them a simple email to cancel.

[doomrobo]

I think this is one of the best aspects of the product. The power is shifted to the customer.