I'm a student and applied for the GitHub student pack which apparently gives $100 in DO credit. How does this promotion work? The email I have registered on DO is not my student one, so I'm afraid the promotion will only work if I'm signed up using the same email as I applied for the promotion for.

Also, in the event that I'm just sent a promotional code and I can use that on any account, what's the deal with only 1 promotional code working? I already used one when my friend referred me but I'd rather use the $100 credit if that's the case.