As of yesterday, the price of the first expansion to AI War has been lowered to $9.99 instead of $12.95. This was done for a variety of reasons, mostly that $9.99 makes it a bit easier for people to pick up the game without feeling like they are digging too deeply into their pockets.
For those people who preordered it at the higher price, you should have seen a credit come back to you for the difference between the old price and the new -- I was waiting to announce this until that process was completed.