hmm... giving out likes isn't something I do willy nilly and shouldn't. This effectively would force me to potentially lower my threshold of what deserves a like. Likes shouldn't be mandated (at least I don't think it should).
I think this is a big step backwards.
Now receiving likes is an interesting idea. But I'd rather see it as a percentage of your posts in the last 100 days. That would be more meaningful to me. If the leaders aren't posting quality items any more (and if they are, they are likely getting liked), then it makes sense to not keep them as a leader.
However, the way it is phrased above, it sounds like 20 likes can occur on my old posts (that are outside of 100 days) and it will keep me as a leader. It isn't based on the posts within the last 100 days.