I don't think the individual points championship is a serious motivation to more than a dozen people each year. Club championships might motivate entire clubs, but only certain clubs. But the existence of points motivates many more, whether it's to gain certain awards, achieve personal goals, or just some nebulous belongingness. It would surely be possible to award points for those who want to keep tally but not publish an official list or ranking, and award shiny badgers to all who qualify (if they want them). But half a point is just odd. If points for 50km are really wanted, just start a new points system from next year with 1 point for 50km, 2 for 100, etc.