the real beneficiaries of this would be small miners (small business owners?) who either use their own locally generated power or the residential grid. oh, and all the people who don't mine in the US
the utilities know what the power is being used for
A basic industrial unit with a 10 kilowatt supply? They'll supply you no-questions-asked.
If you're a huge operation like a steelworks, consuming tens or hundreds of megawatts, they'll want to work closely with you for capacity planning.
If you've got special business requirements, like a hospital or data centre that needs redundant, highly reliable power - you'll have to tell them that's what you need.
If you want to negotiate a discount below their normal prices, an account manager will sniff around your company to try and figure out how price-sensitive you really are.
If you want a big upgrade to your building's power, which needs new cabling installed or the road dug up? The workers might not keep quiet if they see you're a cannabis grow operation.
Additionally, they need to know which clients to restore power to first (hospitals and essential services) and who can wait (commercial buildings on a weekend? Back of the line)
Note: it isn’t that they know exactly what the power is used for, but they sure know the general purpose (residential, industrial, critical service, tech, etc)
Maybe it's different in strict commodity markets but this knowledge also allows you for better cooperation. From little things like when to set service windows to large infrastructure investments for which you might want some buy-in before they happen.