Holland is right. And others are right, that this thread does not belong on The Buzz.
The Hilton website confirmed my booking, after I selected "show me all rates" and chose the "$0.00" one and entered my credit card. The website warned I was obliged to pay that rate if I clicked on "I agree". And pay I will all incidentals that I accrue and sign for like mini bar and meals and parking etc on my free weekend.
Hilton later emailed me the confirmation that the rate was $0.00 for ALL 3 nights of the booking for that property. And I went to the Hilton website just now and it re-confirmed the booking was held at $0.00 against my credit card for all nights. So the stay will not in fact be "FREE" and I will ensure that. There are dozens of folks planning for a specific Flyer weeekend in California early 2002. Those not privy to another regulated board's info need not and should not be appraised the details or date but it is sad some there spilled the beans.
The multi night post above is one person's extreme spin - most others simply booked what they could use themselves, or offered surplus rooms free for others to use that weekend. I do not see the problem - it was a Hilton website glitch, and Hilton need take it on the chin.