Horseshoe Southern Indiana.
If we are talking REWARDS CARD the only thing that expires is the tier points that you have to earn for Diamond or 7 Stars. That expired on Dec 31 2009. You start over on Jan 1.
As long as you play every 6 months your points roll forward. Heck, I have earned $147.00 worth of points since Caesars now Horseshoe opened 10 years ago.
I do not play as you cannot win.

My wife however is a Diamond and has been always. She plays, I eat.