Well, now I can answer my own question, at least as far as the two hotels where I used this rate. I had previously signed up for WN RR program, and I carried the card along, but I wasn't asked to show it at either property (Marriott LAX and FI MSY). I was given a very nice room at the LAX property, and an ok one at MSY (rooms at the Fairfield Inn are a bit run down, but the service is nice and the b'fast is decent). In both cases, no questions were asked about the rate. As long as the rules in the reservation screen don't expressly say otherwise, I believe this rate is available to anyone who participate in the Rapid Rewards program. The points for the Marriott LAX have already posted, so I can confirm that this rate is also point-eligible.