I'm having the same issue I used 4 codes (bought all the redbull and the 4 pack even though i don't like them) still haven't seen anything in game yet it's been 4 days.

I'm also having this same issue. I have entered 5 codes, but have not yet received the Focused Light from the postmaster. I'm playing on Xbox 360.

Same thing is happening with me. I've put in several Red Bull codes and even put in the Bungie code for Talk Like A Pirate Day for 3 Strange Coins and nothing is showing up at the Postmaster. I looked at some of the articles that Bungie has published but they did not help. One of the articles says to go to your profile, go to Codes, then select to activate them from there but I don't have the option to activate them from there because they all say that they are waiting at the Postmaster. I've tweeted to Bungie and BungieHelp and can't get a reply. In the event that someone from Bungie reads this... I'm currently playing on Xbox One if that matters.