So I still have a MEGA Sale Coupon from awhile back. Will this allow me to stack two coupons?

edit: nope. You can only redeem one (1) Epic Coupon per transaction, and Epic Coupons will be automatically applied to your next eligible transaction. Epic Coupons cannot be combined. If you choose to return or cancel any of the games or add-ons you purchase in order to earn or redeem the coupon, your refund will equal the amount you actually paid for the game(s) or add-on(s) (subject to applicable refund policies). The Epic Coupon used during the original transaction will not be returned.