I recently saw advertising for the Travelex prepaid card and I just realized something: with a currency conversion fee at 5.5%, use of such a card may be one of the few times where DCC makes sense. Assuming the DCC fee is below 5.5%, of course.

That said, there are much better cards than Travelex (even just paying the 3% FTF on a regular debit or credit card is better), so I imagine most people wouldn't even consider getting one. Not to mention that DCC in general is a horrible concept that shouldn't be encouraged at all.