[londons_explore]

> trying to be helpful

Some places they're insistent that you must do currency conversion or the payment won't work. Makes me think the merchant must be getting a chunk of that profit and telling their staff to accept the conversion...

[bayindirh]

Another more benign reason possibly be the customer's card might be closed to different-currency transactions.

For example, I can choose my bank to do the conversion at the time of purchase, or pay with that currency when the invoice comes.

[fn-mote]

> Makes me think the merchant must be getting a chunk of that profit Yes, they are. (No reference handy.)