[nivloc]

Amazon and Steam work the same for me in Canada/Latin America - have to use a local card. That said, I've still been able to make some purchases without switching. I've long given trying to understand the nuances of it.

[evoxed]

Note to Steam users: Use store.steampowered.com/?cc=us (or other country code)

My only credit card is US based, and so I was pretty frustrated for a night trying to purchase one of the bundles from my humble Yokohaman abode...