You just block their IP’s; Gain intel from internal employees; Have the expensive law firm start sending C&D’s and prepping that law suit.

If you tell someone that they can’t use your product in a certain manner, and then they go to extra lengths to circumvent your measures to gain a profit for themselves, then there is going to be big civil and criminal legal problems.

State sponsored or not; Bytedance has a bank account and business license here in the U.S.