I couldn't find an industry average but my credit card gives 1.8% above IBLR (interbank lending rate), normal currency conversions for transfers from my bank ac

I couldn't find an industry average but my credit card gives 1.8% above IBLR (interbank lending rate), normal currency conversions for transfers from my bank account are even lower. But that is beside the point since I don't WANT to convert it (and neither does OP) there are lots of things you can buy with dollars. Since they do allow you to transfer USDs if you happen to have a USD bank account with a US bank it is very unlikely that regulation says they cannot do that for non-US banks (they are registered as a bank in Europe). As a foreign national you can only have an account with a US bank if you opened it before 9/11, so most people are stuck. IMHO they are simply taking a few extra percent because they can.