Thanks to all of you for your insight!
Obvioulsy I must be picking properties where they do not particpate (St. Lucia, Seychelles, etc.) Just my luck!
Wish they would tell you that instead of saying "not available" and keeping you on the line for an hour looking at alternate dates that don't even exist!
As a Gold, obviously Hilton does not care about my business, as they have not yet responded to my emails.
To all: Happy New Year!