I've spotted a deal on the Hallmark website, where you can send free e-cards. But what's really juicy, is that you can send some of them with a free game download from BigFishGames. I've gone through the process, and it showed the following link:
In this promotion, as far as I know, the coupon codes are unique, and can be used only once. So, you will have enter your email address to get the free games. I recommend using a free disposable gmail account, or something like that.