Most of the toplists are just filled with spambots/automations/etc. Also, at least my pov, could this be a quite funny project if better measurements would have been taken. Autoscraping is always a good idea but why not turn it arround and call it a competition. Make people commit their info via a github app to place them in the different rankings and also a global one.

Alot of people always want to compete and present theirsel so it should drive itself if spread at the right places. Also you cann add monthyl rankings and stats with persisting medals to earn and keep on the profile page kinda linke a trophy shelf.

From here on you can just go the full gamification route with levelling etc.

glhf