I'm not so annoyed with the "no-advertising" rule as much as I am the lack of a paid-app ecosystem. As a Glass user, I'd be just as happy to shell out that $1.99 for an app I can use ad-free as I am on my phone.
I don't think sure Google will advertise on Glass in the way people predict. Maybe they'll do some kind of suggested-search stuff, but nothing like some random banner ad bouncing around in the corner of your eye.