Just for fun, I went and googled a temperature map for Russia today. The word that spring to mind is "Yikes". Continental climate and very northernly geography means that Russia gets very, very cold. Which in turn means that unless they get their heat from some other technology than gas, they are not going to sell a joule that is not strictly surplus. Because they would literally die.
Suddenly the various stabs the Soviet Union and Russia have made at nuclear district heating make a lot of sense - when the temperature hits -40, that probably seems like a lot better idea than it does to people in less.. Hostile. Climes.