probably a third party processor charging the fee most likely...western union and other person-to-person charge up to 10%...
you can also email them to credit your fee charge, sometimes they comply...
The last time I deposit there, I remember it was $25 plus a dollar or less processing fee. That's was when Lock poker first open from revolution network
I think you might be able to deposit 20 or 25 minimum there now.intertops is another good skin on revolution network too, although i think you had to have an old account there, cause they dont let USA players make new ones there now.