The number of participating Holiday Inn properties are as follows:
AZ - 9
CA - 45
CO - 8
HI - 1
ID - 2
MT - 4
NV - 1
OR - 4
UT - 3
WA - 7
It would make sense just to pick up the rebate using the free coupon if you happen to be at any of the properties during the promotion, but you are right in that the $325 minimum fare, domestic use and Saturday night stay would definitely limit cashing in the $100 rebate to a very limited group.