I don't think the company makes any secret of operating in any city. As far as I know they are quite public and let elected officials know they are going to operate in their city. This means that the city can quite trivially subpoena the company once it starts operating. The drivers are just trying to earn a living. So basically the company was practicing civil disobedience, but was kind enough not to try and keep individual drivers just trying to make a living out of it.