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ZeroHedge has an interesting article this evening about BTC mining in Siberia (near the town of Bratsk):

https://www.zerohedge.com/news/2019-09-04/bitcoin-miners-are-headed-siberian-town-cheap-electricity

Specifically mentioned are three mining companies:

--  BitRiver
--  Minery
--  Cryptoreactor

Cheap electricity (3.4 US cents / kilowatt-hour), cold weather.

The article mentions that most machines there are owned by Russians and Americans.