Does this mean i have membership to the game and can access DLC content? http://puu.sh/gf5Rt/be3c642583.jpg
Sounds like it was just an advertisement then. You'll either have to buy the membership, or the DLC for Rage powers.
I'm premium and saw the same 'active' status in my account screen, not sure why it's that way now but I'm definitely not paying a subscription.
Sometimes they give random players a few days of subscription as a promotional tool. There should be a part of the account menu which shows you when it runs out.