@nitinkhanna Yeah, it definitely comes across that way based on the copy on the site. But Kill the Newsletter is really just an email to Atom feed service. Sure, you can set up one email address per newsletter. But you don't have to.
You can also have one inbox for all your newsletters. And it's not just for newsletters either, any mail forwarded to the address will appear in the Atom feed.
Instapaper sounds like a great alternative as-well.