There has been a reduction of service, but it’s not deliberate, it’s because there aren’t enough crews.
And one factor in crowding is that many cars are unusable because of bums turning them into bedrooms and toilets. They get a car each, and the normal people have to crowd into the one or two cars they are not inhabiting. In my opinion THAT is the main reason for the four-hour shutdown that Cuomo has now imposed; it gives the police an opportunity to roust the bums out, and hopefully some of them will take a while coming back.