You didn't pay in advance for the headstart - You purchased the game that comes out on the 2nd. At this point, you are not paying a subscription fee, and the time you are spending in game is currently free of charge.
The thing these idiots don't realise is that they could actually sell their retail keys/retail boxes after release if they don't even bother activating them. The headstart was linked to your Open Beta key if you pre-ordered. I have a retail key on my D2D account that is in no way linked to my STO account, htus I could sell it off if I wanted to (won't be though, I am loving this game atm). QQ some more please.