No matter what the motive for this, it does not look good for the future. Uber kind of showed its hand here. What is the guarantee that they will not ask for a

No matter what the motive for this, it does not look good for the future. Uber kind of showed its hand here. What is the guarantee that they will not ask for a fee to get rides in the future? Or may be ask for a recurring fee of some sort as a privilege to drive for them? I know I am extrapolating too much here may be, but the path is there.