I agree. Even if you don't want to put hard number, saying "very low chance" "average chance" "high chance" at least give an indication. The way you present it, Vice MVP double your magna income compared to simply hit once and leave to do another.

If you say "very low chance of magna" for vice mvp and "average chance of magna" for all participants, it doesn't convey this false impression, and a reader readily understand that vice mvp is really bad.