Well if Soros has broken Russian securities and monetary transaction law as I have seen claimed. Russia then tries Sores in absentia if necessary and if convicted request the US extradite. Soros was convicted of similar violations in a French Court as far as I know the French have never requested extradition. Statue of limitations (If they have such a thing in French law!) may have run out. The Russians I suspect are of stronger stiff and might not be so lackadaisical about Sores breaking their law.
Do you think America would honor an extradition request? What country would? Maybe Cuba, or Venezuela.