One year we got $300 (or less...) bonuses. It was just how the math of this complicated system worked out.
A lot of feedback was given about that program and it wasn't positive. They came back to a few of us asking us to elaborate. I told them "I once got a $300 bonus working at Little Caesars (American pizza chain) for selling the most crazy bread in a month."
They finally got the hint and canceled the entire thing, it was better not to have it at all IMO, more demoralizing having it around. $300 is better than nothing, except when it sends the wrong message.