Well it's just that the 2K credit expires this March. Other than the EC sale coming up in a couple of days, I don't remember seeing any other big sales before summer.
Any chance that Civ V: Brave New World will be cheaper than $15? I don't have any EC coupons, but I'm trying to finally use up the old 2K Games credit I got way back with Bioshock Infinite and trying to stretch it as much as I can. Don't want to completely lose my chance either though if BNW...