Originally Posted by
tmiw
On that note, another factor that might make DCC less common is the cultural expectation in certain industries (e.g. restaurants) that the customer not run their own cards. Of course, DCC is still possible via the checkbox on the receipt method (like what Hong Kong apparently does/did), but I'm not sure it's worth the trouble for many to implement that approach.
I suspect it's difficult to implement DCC if the customer is expected to leave a tip. If you try to fool your customers to pay extra for DCC, expect no or reduced tip.