The best way to pay for your World of Warcraft subscription! World of Warcraft-US 30 Day Pre-Paid Game Card Codes. Delivered via E-mail within 20 Minutes as soon as we confirmed your order. This Game Card code can be used with your World of Warcraft gaming account to subscribe the account with 30 days of playtime. This is a U.S game card code and can only be used on U.S and Oceanic World of Warcraft accounts.