I learned that lesson in grade school. The teacher's point system never recognized me for being 'good' when the random award of teacher's points to 'good' kids happened. I noticed it was mostly noisy kids finally having some unintended quiet time and then getting surprise gifted with points, while the ones that regularly followed the teacher's rules were forgotten. I can't even remember what the reward was, but fast learned to ignore the points board and not waste time on a desire to be the points winner.