Is there a way to add additional time?

Hello, I set my sub up for 180 day re-occuring and was wondering if there were any ways to add additional time to that. I've tried adding it via Crysta but it wouldn't allow me due to my sub still going, and I've heard that you can with game time cards but I'm unsure where you enter those.

Game time cards are only available for EU. If you're in NA, some form of recurring billing is all you've got.

A recurring payment means it will automatically take payment when it runs out. Assuming you have the money in your account at the time, you never need to worry about adding more time. If you want a more controlled way to add time the closest approximation to adding time you can do as an NA member is to set up a recurring payment with crysta as the payment method, then pay for crysta to pay for more time.

Chances are he's wanting to do this to get the 270 day veteran reward early.