I just bought a gift card. I want to use it for a subscription but I already have one. Do I wait? If I add the subscription now, will it addon/wait until my last subscription finish?
If you redeem the card now and purchase a subscription it will add the time on to the end of the existing subscription.
As an example, if you're subscribed until May 12 2010, and you redeem your Gift Card today, your subscription will be extended for 30 days beyond the end of your current subscription.