I'll be traveling to Europe in a couple of months so any feedback on improvements on Diners acceptance after changing the settings would be appreciated. But I have my doubts because of the generally poor acceptance there. I've never touched any settings on the portal.

Interestingly enough MC/Visa acceptance in US was 9.5mil while Discover was 9.3 mil and Amex 6.9mil (2014 figures). So it looks like Diners would work very well in the US, India (HDFC), China (UnionPay), Japan (JCB) etc.

Of course we don't know if they will extend the 10x on international spends - they haven't done it as yet!