Syria is blocked from SWIFT for a much longer time, it's not that painful. Think of it this way: you use their network they make money out of you, you use other networks, they lose. It's sanctions against themselves.
True there will be burden transferring money from other states into Russia, that's why you should develop the alternatives much faster and start training concerned parties to use it, for sure many would join with the increasing US paranoia and the dollar and euro as well will start losing value instead of being inflated without basis.
You should also develop credit cards mechanism, that would cause huge losses of revenue for the western based cards giants and money transfer systems like online system PayPal and remittances through exchange houses. What are you waiting for?

Posted using Partiko Android