I hate to beat a dead horse...but then again, it's fun...
The BOGO Certificate states "accomodation only"...Priority club help desk told me on the phone, certificate was good for anything included in the base rate of your paid night...when I asked for that in writing a week later, the email (which I just re-read) stated good for "room accomodation only" - also supporting my point that even in the hotel industry, there is a difference between "room accomodation" and "accomodation"... and the certifcate does state that it covers "accomodation" ...not "room and tax"...not just "room accomodation"