The roll-over nights policy is completely separate from points. As Blava007 stated, your points do not expire. Roll-over is a way to reward people for nights stayed above a reward level. I noticed that you are Platinum. Lets say you stayed 85 nights last year. Since you stayed 10 nights more than the 75 nights required for Platinum, you would roll-over 10 nights and your first stay this year would be your 11th night making it easier to get back to Platinum. The only catch is that roll-over only last 1 year. If you end this year with 90 nights, they would backout the 10 roll-over nights for a total of 80 nights and 5 nights would roll-over into 2012.