> It would be because it's illegal and violates the licenses, desires, and intentions of the thousands of workers who wrote the code in its corpus.

Copilot makes source code much more open, if you think about it. It implements code reuse in a different way than classes and libraries. It offers its skills equally to everyone, skills learned from everyone.

As for the cost of the API - it's expensive to run large language models, I think the price is justified. But there are free models if you like to run your own.