If you sell someone a game that relies on a server you own, and did not advertise clearly that you were selling a service, not a good (something you own), and then break that product for the customer without any possibility of them repairing their good, and you delete the code that could’ve fixed it, you’d be sorta commiting fraud.
If you abandon a product that was sold as a good, and it became inoperable due to forces unrelated to you, you’d be in the clear.