Legalizing is one thing, the other is the fact that the energy "must be" cheap there as well considering how much of it they are selling. I have zero clue how much people pay for electricity there, maybe it's very cheap or maybe it is not, if someone who is a Russian would enlighten us (or someone who is not Russian but can google better than me) that would be great. Between the legalization, cold weather, cheap prices then we are talking about something that would be super profitable. At the end of the day it's not really that shocking to see Russia being a great hub for all the crypto miners of the world. It is quite the ideal place for them and checks every single box.
Around $0.071 when you check from the internet. Which means if you have 8 GPU right of 3070 (non-lhr) that would earn you 600 dollars per month. By the looks of it, that wouldn't be enough to survive, but it is certainly a good side income with not too much money spent (less than 20k) and the return rate is quite good as well. The price of electricity is certainly cheaper than most places in other nations, there are a few that are cheaper, but not that many.
Cold air is certainly great but that will also means that you need to be more north or east, places that are closer to west are not as cold as the places that are closer to east, and that means it would be further away to capital, don't know if that matters or not.