I tend to always read these, both when I sign up and when there are changes. Idk if I ever felt that it changed significantly at all from what I expected originally. They are “updated” annually and when a new law passes so usually it is no change or something about the new law. Basically usually if you consented to the original privacy policy, updates are unlikely to have anything surprising and new to change your mind. I guess unless it went from none to some/a lot of shared data!