Extradition only applies in criminal cases. You could serve the Pope, but I doubt the Vatican recognizes suits against the Big Guy. Maybe you could wait for the Second Coming and serve Jesus himself? Of course, if you're the type of person to sue God, you might be a little busy what with being cast into a lake of fire and all.
Yeah, Russ has proved he's arguing in bad faith, so they'd want to cover all their bases so he couldn't claim they defaulted and Freemantle has to spend even more time dealing with him. Now, I don't know if Russ will manage to pay the fee, and even if he did, it looks like arbitration is held in LA, so how would he get there? He doesn't fly, and it's way too far to take a bus.