Lots of places have a mandatory tip screen, I have literally never seen one that didn't have an "enter your own percent" button that allowed you to enter zero (

Lots of places have a mandatory tip screen, I have literally never seen one that didn't have an "enter your own percent" button that allowed you to enter zero (if not a skip button) Perhaps many people aren't recognizing that that's a 'no thanks' button that makes tipping non-mandatory?