Canadian bitcoin miner Hive Blockchain (HIVE) earned about 184 BTC ($3.1 million) by curtailing its power use in December whereas it mined the equivalent of 213.8 BTC.

Miners have been curtailing their power use at times of high demand for energy, selling the electricity back to the grid, in order to cope with market headwinds that have seen some of the biggest names in the industry filing for Chapter 11 bankruptcy.

(By Eliza Gkritsi)