Didn't lyft shut down their carpool commute feature, because nobody wanted that?
If you're "ride sharing" without actually stopping to pick up/drop off additional passengers, it's just a taxi. An unlimited, unregulated number of taxis. More cars on the road, fewer people on public transport, more pollution.
It's possible I misunderstand how these taxi companies work. I'm invisible to them. I don't have their apps. I'd rather they not track my movements every half minute for the government to subpoena, for a fee of course.
If you care about the police, they can subpoena your phone's location no matter what app is running on it. They can also find your car with license plate readers.