I think they will be doing some manner of refresh. I only put in two codes, but a few days ago, I had two more (total of four) focused lights in my postmaster. I also had the Christmas package and the 9 coins for your email. Chances are, they'll do something like that again. Just check your redeemed codes section in your Bungie profile.

Yeah I saw that. I'll keep putting new ones in either way.

Same happened to me.