Does it make sense to spend overseas on credit cards to earn miles instead of using a multicurrency card instead?

It depends on the valuation that you give for your MPD. Since different people assign a different value to it, there is no right or wrong answer.

For instance, the FX fee may add up to $5. However, I value my miles to be at $6 for the same purchase. As a result, I will choose to pay for the purchase using my miles card instead of a multi-currency card.

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