Here in Australia it's probably 50/50 that any given merchant will accept Amex or Diners, and of those that do, surcharging up to around 3% (though I've seen up

Here in Australia it's probably 50/50 that any given merchant will accept Amex or Diners, and of those that do, surcharging up to around 3% (though I've seen up to 7% before!) for Amex is quite common, particularly at small businesses.