Malaysian cryptominers stole $722 million worth of electricity over six years, a local service provider said. After China banned cryptocurrency mining, Southeast Asian countries became attractive to miners because of competitive electricity prices, labor and existing infrastructure.
I have a doubt about that statement, cause if you moved to a country because of lower prices you don't go right stealing power from your neighborhood grid.

But energy theft from private bitcoin miners is nothing new and won't stop unless you have the whole grid monitored everywhere, income is the lowest in years and even the tiniest difference can count, I wouldn't be surprised to see some stealing just part of their energy so to not draw suspicions and pay for the rest, a 20% cut would be the difference between profitability and loss.
700 million in 6 years, 120 million a year, 5 cents kwh, so 600 million kWh, so about 20kwh per capita stolen, might not look much but it's still something.