I have the simple app installed but never thought about getting a simple card. Can you describe the process you use to upload HUF to Revolut via a Simple card?
BTW: if I upload money to R via curve then my HUF card is carged with HUF, curve does the exchange and transfers the funds to R. Curve normally has a LOT better exchange rates than your bank itself. I was able to upload money to R with the loss of only 0.2%. At the same time once I have experienced a similar rate like reppag (about 2%) which was really annoying. The solution? I already had money on R, so I have used Curve’s time machine option and transferred the charge to my R card. As a result the money was transfered back to my HUF card and Curve charged R to add money to R. So at the end at least I did not lose any money. Have not tried curve since then, I can imagine that it works fine on small amounts.