A lot of people have been having trouble redeeming redbull codes and them not working. I've heard quite a few screaming for the ban hammer because of how many codes were used. Just to clarify, they could do this and ban anyone who used a code off of someone else's can, but they won't. If they did they would lose the support of about half their community including a massive amount of youtubers. Tl;DR Bungie isn't going to swing dat Banhammer