MAGC at Marriott is really (regardless of points that are supposed to be awarded) hang tag, eventually check out, don't get points, get annoyed because Marriott doesn't make any easy way to contact them about MAGC points missing, try contacting that with no response or long wait, ultimately get nothing. In Marriott's view, apparently the reward for MAGC is the warm feeling that you are supposedly doing something good for the environment! (and helping the hotel get some more green)