Okay, this is pretty straightforward. By paying for WoW using these prepaid game cards you get the game cheaper than if you pay month to month using a credit card. On top of that you get the added security of not having to give your credit card info for your subscription. For parents of young people who play the game this is even better, ensuring that your personal information will stay hidden in case the account is hacked. And remember, these cards ship free if you buy over $25 worth, so keep that in mind. Overall this is just a great value, and a cheaper way to feed your MMORPG craving.