The Friends leaderboard is anyone in the current year Strava group but NOT on one of the competitive teams. Since there are not competitive teams yet, EVERYONE is in the Strava group and NO ONE is on a competitive team so there is no one on the Friends leaderboard.
The purpose of the leaderboard is to make the Friends feel included – as if they are part of the fun if not the competition. Perhaps the following year, they will be so inspired by BAFS that they will join! Or they will heal from their injury or finish school or whatever kept them from competing this year will no longer be a barrier