Hmm... Almost three months later, I would hope so.
But then again, what an awesome response from the people that took them. NOT.
I put that as i deleted a post by someone who earlier that day was going on about the codes being gone, its a 'nice' way of basically begging for a code. And yeah 3 months later its a joke, they basically put 'oh no all codes gone - sad face' as they then want the dev to give them a code.
But yeah its pathetic when people dont give a response about the game as thats the whole point of promo codes.