I think it makes sense to announce new stuff when it's ready, as Apple generally does. Whenever they announce something that's not ready, and it's then delayed (see iMac, Mac Pro), the whining gets even louder.
Huh, dunno then. I just went to Your Account > Email Preferences & Notifications and I have two main options: [ ] Send me marking email from the following categories (with the 42 options) or [ X ] Do not send me marketing e-mail. If you had that checked and you were still receiving marketing emails, it must've been a glitch. Maybe select "Send me..." then switch back to "Do not send..." and see if that fixes it, if they don't stop.
"Reason that I stripped off hobby label, when you look at sales of the Apple TV box itself, and the content that was bought directly off Apple TV, for 2013, that number was over $1 billion." — Tim Cook, today