请大神指教 Promo codes are one per account. It would appear you presently have a code on the account. We would need to remove that, verify this one and then you should be set.
Please let us know how you wish to proceed.

意思是说每个账号只能绑定一个学生优惠码，不能叠加，想用新的，就要删除老的，不要贪心哦！

送的十美元相当于用了一次优惠码

楼主，用完送的优惠码还可以用学生的优惠码吗？