Commercials both audio and video are considered annoying, yet youtube is loaded with video commercials that attract thousands of viewers?
Some methods of marketing are considered annoying(hate spam), but I would hazard a guess that readers would be very disappointed if there were no more email marketing.
Why is a commercial zapper necessary?
Why is it that some responses that are elicited when a reader unsubscribes is "I don't wont you on my list anyway".
Email...

Spam has been responsible for delivery rates down to 40%, open rates are 15% and reponses down.
How can this model survive?
We still do not have adopted an effective replacement.
It's a push model that some see as becoming very intrusive.
In fact it may have been abused and overused.
Does your list still love you?