Amex offers had a 100 off 500 deal at the end of the year last year, so i prefunded my reservation at the waldorf jlem (on both me and my wifes cards) 525 a piece.
no credit came up, and i finally got an answer tonight, it only applied to US hotels! i kinda feel like i knew that, but on dec 29 i just got crazy and tried to grab it...
really just lost out on some points (using plat instead of a multiple points for hotels card), but also time wasted filling out payment forms.