The takedown notice says that the "plug-ins are in violation of the terms of service". This is super odd. So what would happen if I never bought their product and hosted this repo - while not being a party to the terms of service?
Sounds like the company could just invalidate that API key and break the integration themselves whenever they want.
Initially I had the same thought: I'm not using their services, how can I break TOS? But this explains it. If a device cannot be controlled locally and need their cloud connection to work, it's in a high risk of becoming e-waste at some point of time. That's why I would never pick such devices.