OP's math doesn't account for the fact that a small fraction of trips into the city are personal vehicles, and many more are cabs/rideshare cars (which pay diff

OP's math doesn't account for the fact that a small fraction of trips into the city are personal vehicles, and many more are cabs/rideshare cars (which pay differently) and trucks making deliveries (which may be exempt). In any case, there is also going to be widespread toll fraud here just like with every other toll in NYC.