Since nobody seems to be putting the actual facts as a response:
As part of an agreement with the power company, the city gave them the right to build a large hydroelectric dam on city property in exchange for access to an allotment of power at an extremely cheap rate. When they exceed that allotment, the city has to buy off power exchange, which is significantly more, accounting for covering storage, exchange, and transmission costs on the larger network.
The city very rarely (or never) exceeded that allotment before, and now is. Because of how the contracts are structured, that additional cost is passed on to all consumers on their bill - everyone pays based on time-windowed averaged costs of power over the month, not the exact real cost at the moment of consumption (this is pretty normal due to storage and variable rates per time block otherwise making bills goofy complicated).
The result is they voted in an 18-month stop on NEW cryptomining operations (existing ones can continue) with a plan to submit to the appropriate regulatory bodies a modification to electrical pricing that would allow them to place the additional costs from the Power Exchange on high power utilization businesses, rather than across all users. The cryptomining operations mostly seem okay with this, as the proposal still sees them get a decent chunk of cheap power.
Note that's 28% before taxes. Between State, Local, and Federal, figure they get $150k a year pretax, $100k a year post-tax, but spend $50k a year on their mortgage. That's $50k a year for ALL other expenses, and that number excludes homeowner's insurance, car payments, car insurance, health insurance, property taxes, electricity, water... oh, and food. That's why 28% is so important - you wind up with 30% on Taxes, 30% on Mortgage, 10% on a Car and Related Expenses, 10% on Home Related Expenses... and you just ate 80% of the yearly income.
Cali's actual total tax rate is a little higher than that, but you get the point I think - 28% isn't an arbitratry number, it's more like a 'this is a good margin of error' factor.
Blizzard own copyright over things like Quest Text, art design, textures, logos, map designs, and sound/music independently of the game. If they rebuilt their servers without using any of those, the case would be in question, but it's not. Even if purchase of a game gave you the legal rights you're implying (and it does not!), it does not give you free reign to use the remaining copyrighted content.
The second element is the question of abandonment. If you buy a copy of World of Warcraft off the shelf, and install it, you can still play it. That the specific version you want is not available doesn't mean the game itself is abandoned. Wizards of the Coast can (and do!) go after people who mass print for distribution their own copies of cards that are no longer legal or in print despite those being for a version of the game which is no longer in existence - there's no question that, even if they've effectively abandoned that version of the game, they still can control distribution of those cards.
TL,DR: Blizzard owns multiple levels of copyright on WoW and it's constituent parts, and even if an out-of-date version of a ongoing, consistently updated game counts as abandoned, they still have a number of claims against people running servers in a even semi-public fashion.
Chemistry professors never die, they just fail to react.