I'm also urged to know what is mean by Diamond One Off.
I try to book a room at Bangkok and is shown ONLY US$45 per night under Diamond One Off rate. Yes, only US$45 per night. Not sure that can I book under this rate or not?
Anyone have any more information on Diamond One Off rate? I also email to Hhonors on this issue but haven't receive any reply yet. (.. less that 24 hours ago...)