By this day it's pretty obvious that the current two Leaderboards do not really represent the Nim community. From what I can tell, ATM, the only persons in both top10s Awho are provably using Nim is Michal Maršálek (although there's no link so you need to know [his GH](https://github.com/MichalMarsalek/Advent-of-code/) account) , and me (in top10 only in the newer board though). Others mostly either don't have the repos associated with their AoC account, don't have any open AoC code or simply use other languages, such as Python and C++. IMO, the size of the last category is just too high. Even _some of the mods_ here use other languages. ;)
Sadly, AoC auth makes it a bit difficult to create and maintain up-to-date leaderboards without purposely-made accounts.