There are multiple LEGAL crypto-mining facilities in my mid-sized US South city.
I don't know the specifics, but having spoken with a few of the technicians, it seems our local publicly-owned electric utility has agreements with these facilities for Time-of-Use offsets, which significantly reduces the kWH pricing.
There is a single facility in my city which is allowed to consume about 1% of entire multi-county grid usage, but must agree to seasonal shut-down schedules where local utility can take them offline almost-immediately during emergency demand peaks.
For their predictable baseload usage (21/7) and not-too-damaging shutdownability, the 1% miner gets kWH's at around 2¢+/ea.
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Majority of our base-load energy is hydro/nuclear -generated, so my only remaining complaint is that these AI/crypto -mining facilities ought to somehow be incorporated into a local centralized heat distribution facility, perhaps to generate steam (or possibly even pre-heat existing generating facility water pre-steam/turbine).