Destination fee here is now 12.50, and they will update it on existing reservations. Happened to me twice. Once when first introduced at 9.50 (was not there when I booked) and on an upcoming one where it was 9.50 when I booked and is now 12.50. If they at least added it to the room rate, we'd get points, but they don't so we only get points on that fee if we charge to our IHG card. :/
Upsets me, but I really like this hotel and its location. I know there are lots of other choices, but I do get treated well.