Well there's no prize for it... so it's just numbers.
I'd like to see some sort of 'All time likes' information somewhere in a player's profile in general... maybe an achievements or trophies tab that outlines what events they've won/placed in on the leaderboards... along with any previous accomplishments like the easter event... or candy grab at halloween... something to bring noteworthy feats and even just participation in the game to light in more than just pure numbers