It’s bloody Paypal (ACR are open to your suggestions regarding alternatives)
They’ll take a minimum transaction fee of around 40 Euro cents (plus a smaller percentage from the total amount of your donation).
In other words, don’t donate, if you can spare 50 cents, because it will mostly go to the money sharks.

Our promise is, that we will spend your donation solely on financing recordings, releases, touring costs, equipment needs, server bills and anything else related to keeping the music flow into your direction.