Yes, but there's a simpler explanation as well: they would probably rather not be paid in Rubles for concern that the Rubles will be worth significantly less by

Yes, but there's a simpler explanation as well: they would probably rather not be paid in Rubles for concern that the Rubles will be worth significantly less by the time Apple is able to exchange them for USD (or whatever other currency) than the Rubles were when the price was set.