International? Forget about it
No way are the gift cards going to be accepted much internationally. The old ones processed as a visa got lots of blank stares and laughs internationally--but sometimes got accepted. Now it took me a week and the very helpful entire accounting team of a European Marriott to do a "forced redeem" of the givex card. This after it was rejected at three other properties and i gave up.
Marriott has done zero franchisee education on this. I am now very happy that i am down to a $14 balance.
I would LOVE it if someone could get their hands on an instruction manual for franchises to process the card as it otherwise takes an act of parliament