Opening and using an account with EcoBanq is free of charge. When you make a payment in another currency with EcoBanq, the provider charges conversion fees, which you will see before the payment.
However, the EcoBanq fees cannot be viewed before registration, they are only displayed after registration and vary depending on the payment method. When withdrawals are made from your EcoBanq account to your own bank account, there are fees that are deducted from the withdrawal.
Most casinos that offer this payment do not charge their users any fees in many cases, but you should check the fee structure of the casino in question before you make a transaction.