Hmm... consider me in favor of this meta journey. Since keeping track of posts would be a chore... how about getting a pokemon / evolving a pokemon for every ten points you earn through the leaderboard?
It's a good suggestion but I'm more of for the posts to encourage more activity. Point-earning will not necessarily translate to more activity?
Well, if you were to do something like it, it should be more specifically tailored to the section itself. So, unlikely it would end up being a Metajourney, at least in the same vein as the ones elsewhere on PC.
I could come up with some ideas for it, maybe.
"Sure, there're probably infinite dimensions, but I'm with you in this one, so why would I try to find them?"