Email marketing is pretty simple – as much as possible communicate with people who want to hear from you. But a subset of these folks just don’t get it.
If I go to the trouble of clicking “unsubscribe” please do not send me ANOTHER FRICKING EMAIL CONFIRMING I NO LONGER WANT EMAIL FROM YOU.
It insures that I move from the “mildly annoyed” column to “actively pissed off at your company” status.