I think he's doing it wrong. Why go through the effort of unsubscribing when you can just create a filter in a few seconds that deletes the message for you? Almost all my filters result in the deletion of email, not filing it away.

"the effort of unsubscribing"?

I don't understand why you would ever waste your computer's cycles on receiving and deleting a pointless email...

I don't. I happen to waste google's cycles. Good point though, I'd forgotten what it was like to use a desktop email client.