Weekly steps challenges sound very motivating, at least for me. But I'd love to win badges and points when I success and when I climb on the podium.
I propose this rewarding system :
Winner badge : Winner 55k challenge + 6 points
Second badge : Silver 55k challenge + 3 points
Third badge : Bronze 55k challenge + 2 points
Success badge : Got it 55k challenge + 1 point