It's a huge pain the the arse, as you have to have many different currencies with you every month (in one month, I go to Japan, Europe, US, Thailand, etc...). Most airlines allow you to bid on where you go, so you can keep your multi-country hops to a minimum. With CX, without any real choice....you can hit 10 countries in a month easily (especially the cabin crew). This will prove to be yet another half brained idea, that will help push even more of the cabin crew out the door in frustration.