My friend needed a code as he can't renew his membership til payday, i told him to look in his games for a trial and in his cod ghosts (xb1) there was a 7 day trial. However, the code wouldn't work, so i gave him my trial from cod and that still didn't work, upon reading the small print i noticed it says 'cannot be added to an existing xbox live membership'. I know for a fact they used to allow these codes and they'd just be added on to however long your membership had left. Has this now changed? If so, i'm unimpressed with microsoft's penny pinching it seems completely needless after all, we paid for the games, and console that these codes came from.