Good question. I was wondering the same thing to be honest. It would be cool to see more premium content for sure.
Glad I caught your post before it was swallowed up by the spam bots.
I've been wondering the same thing over the last weeks and took a look back at the premium content. If you take out the Ask Adam videos (they're fun videos, but I wouldn't really call them premium) the last video is almost 3 months ago (July 17th). You can also clearly see the amount of premium content getting less over the course of the year.
I like contributing to the site by being a premium member, but I feel like the promises made to premium members (exclusive content, first looks, etc) are not kept. I'll keep following tested and love the content, but I've cancelled my premium membership.