I think that Zwift and riders alike would benefit from a bunch of long term leaderboards. Here are just some ideas, hopefully the community has more ideas too:
Most Miles Ridden (Current Month)
Most Miles Ridden (Current Year)
Most Miles Ridden (Life to Date)
Most Miles Ridden for different age groups
Most Jerseys Won
etc etc
I think something like this would be great for personal data, but not really for public leader boards.
The trouble with Zwift is that leader boards are really pointless since it’s not a level playing field.
I agree with Stuart at the moment it is so easy to cheat (by mistake or on purpose). I also think that it would be better to let Strava or another service take care of custom leader boards etc and have Zwift focus on the game.