if you are talking about the loot box their is a set time limit where you can redeem them and in game they would be under the AP tab in your inventory
He's referring to the other icon besides the loot box
I think it used to be some codes in alpha, but right now there are none. Perhaps in the future.
Actually, searching my email inbox i found that Aeria sent me a 20% more AP gift code tight after I purchased the elite founder pack.. niceeeeeeee