Last December a friend of mine wasn't going to make Diamond. I wasn't going to gain any additional Status at CET, I already had about 360k tier credits. So I earned the 825 tier credits she needed. I played VP for two days in addition to my regular play of about 3- 5K tier a day. I would have pulled her card on a Hand Pay and given my 7* Star card. I played a few tier credits for a couple of my other friends last year. I think ion your just play normal for that person and don't play when they're playing I doubt there will be an issue.