There's another thread with a question similar to this one.
Unfortunately, this was not Telltale's fault- there's something wrong with the iTunes store right now, and games other than Law and Order are being affected. Wether or not the offer will be extended due to this snafu is yet to be seen, but it's an Apple problem. Keep checking back and someone at Telltale will be able to provide you with more information as it arises.
I am a community moderator, here to assist, keep the peace, and keep these boards clean and friendly for all. I am a volunteer, and not a Telltale employee, and my opinions are my own.
--Playin' poker with GLaDOS before it was cool--