Just to explain a little better about the newsletter:
The newsletter has sponsors as well to help pay for it (keep it free). But for people who get the newsletter and never read it or click the sponsors it does not help pay for it. Because it is considered bulk email we get charged for every message we send whether it is read or not.
On top of this, some people who sign up for it mark it as spam rather than click the unsubscribe link.
When this happens we pay for the delivery of the message and get a bad emailer grade from Yahoo that can eventually prevent any yahoo subscribers from getting the newsletter.
Maybe this will make the situation a little clearer.