If we get to that, then it wouldn’t be “Non profit making” or “Fair”.
It is not the usual circumstances that are the problem. I wonder how much they charge to keep this topped up? Or using any independent ATM.
But if the charge is a combination one-off fee and percentage, doing a trial will only hurt you more.
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If there was a list of recommended banks to go to which had a simple charge, I’d be more up for your idea. E.g. Go to Belgium, travel dialog box recommends BNP ATMs for 1% charge, other atm fees may vary.