Any info on how the 50% premine is spent? Is it still with the devs 
Yes most definately used for development and bounties mostly, we do have 5 people working with the project full-time so it's good we stll have the coins or we would have stopped adding new features long ago.
I'm positive though we will be able to expand the development team week after week so ADZbuzz can compete with the big social networks when we launch the final version.
You can't expect this coin to have high value in the future when the dev just give them away when users buy VIP packages which actually don't add some value to the coin itself. vip investors may have earned due to the rise of numbers of adz in their account but its value remains.
Just read this: http://adzbuzzforum.com/forum/adzbuzz-passive-income-club-discussion/adzbuzz-passive-income-system-discussion/1760-why-compounding-will-push-adzcoin-to-100%E2%80%99s-eventually
It's basically inevitable that the coin value will go up. Right now it's a good thing for people who do their research that the value is still so low, you should understand that after reading this topic.
