Upon visiting theGeoNet Contest Place, users see a Leaderboard on the main page. Although not currently configured, it is technically possible to have a Leaderboard for any or all places, not just GeoNet Contest.
Although it is easy for a user to see another user's overall reputation rank, those points are for GeoNet, The Esri Community | GIS and Geospatial Professional Community as a whole. ArcGIS and GeoNet, The Esri Community | GIS and Geospatial Professional Community are diverse. Does it matter to see what areas people are strong in and not just an overall reputation? I know this information can be gathered by drilling down within a user's profile, but does it make sense to aggregate that information within a Place? Would adding Leaderboards to more Places be helpful to users?