[andy-x]

Official exchange rate is meaningless as you cannot transfer dollars into or out of Russia. Based on some internal sources (not super exact, but still indicative), I think cash exchange on black market is closer to RUR 150 per USD today.

[TMWNN]

A huge skew between the official and black-market exchange rate for hard currency, such as in Argentina (the "dolar azul"), occurs when a) there are capital controls but b) it's still possible to use those dollars/Euro/Swiss franc/whatever. Argentineans are free to use the US dollar to buy things, both inside and outside Argentina.

Right now, it is more or less impossible for any Russian to a) use the dollar to buy anything from outside Russia, and b) travel outside Russia to buy anything in the first place. That greatly reduces the demand for exchanging rubles for dollars, whether via official or unofficial means.