A:AnswerThis will follow your Federal or State jurisdictions. The cards are not set to expire, but it is best to redeem them as soon as possible to avoid any issues. In California, they can not legally expire.
A:AnswerUnfortunately no, they can only be used on steam for their products. But you can always try to trade the gift cards in at websites that give you money for gift cards!
A:AnswerCard activates on purchase. Code is provided. Go to your steam account. In the top right corner you'll see your wallet net to your steam name. Click the box and select add funds then redeem code. Enter the code and your purchased amount is added.