Just to play devil's advocate

When they first started doing this with WordPress plugins I actually applauded the concept, and for good reason.
First of all, anyone who wants this kind of plugin are marketers, thus they should appreciate the genius of the strategy. You are free to unsubscribe from the newsletter at any time.

Suggesting using a fake 'timeout" email address is something which might affect the guy's deliverability for those people who actually want the emails.

Just think, in many ways the first plugin of this type was Akismet.

Also note, if you hate it enough, it is GPL

The Kindle isn't (yet) suited to the content I subscribe to, often lots of high ticket marketing and business content that is frequently delivered in video form. I would also be reluctant to purchase any $2000 course that was in some way DRMed.
As it happens I pointed out when the Kindle launched that it will have a dramatic (negative) effect on affiliate sales. Amazon have been reporting high sales numbers of ebooks from their bookworms, and as they improve content discovery it will reduce affiliate commissions.
Bloglines did some of the work to support content protection of private feeds, shame Google didn't adopt a similar policy.

I have argued for 2 1/2 years that poor tracking and lack of control of RSS would eventually have a negative effect.
I have a number of premium high ticket subscriptions that I would love to have delivered by RSS, but I currently rely on email as the publishers will never trust RSS delivery. The content is too easily shared, even by mistake with a single hotkey.
I use twitter, but via the web interface. A quick glance a couple of times per day is usually enough to get an idea of what is going on outside my niche that isnt delivered by email already.