I tend to see it as having an impact with new users, but almost everyone stops caring fairly quickly. You see the same sort of effect with some video games whe

I tend to see it as having an impact with new users, but almost everyone stops caring fairly quickly. You see the same sort of effect with some video games where they make highly visible score or damage numbers, which is motivational early on, but a lot of people find the setting to turn it off if they play it for a while.