Your coins, once purchased, will not expire. You do not need a subscription. Just buy the desired amount of coins and use them. If you run out of coins, you have to buy more, before you can make further purchases. All available Images/Icons in all sizes offered in THIS shop can be purchased with the proper credit amount. The purchased credits are only valid for THIS website. The Payment method in this Shop is PAYPAL. If you have any questions, please contact us!