Stopped at the Harrahs Reward Center today, as I needed to get my Platinum Card. The guy I spoke to named Carlos told me Harrahs will renew Diamond Card, only if you didn't do match last year. After that, they will allow you to match to Diamond every other year with your competitor high level card. Doesn't make sense to me, so much competition in AC with all the casinos. Harrahs was soo empty today also. Hope everyone who needs to can tier match.