When it comes to exchange rates, it's important to note that these are typically set by financial institutions and not by the casino or credit card companies themselves. Credit card companies do offer the convenience of automatically converting your deposits to the casino's accepted currency, but they often charge a small fee for this service. The actual exchange rates and fees can vary widely between different credit card companies and banks.
As a result, while using a credit card for deposits can be convenient, it might not always offer the best exchange rate. It's advised to research and compare rates from different sources before making a decision. Additionally, be aware of any potential foreign transaction fees your bank or credit card provider may charge for deposits made in a foreign currency.