I'd remembered it as: since Monks are weak and sinful creatures that tend to upvote anything they're pointed at, showing the top n tends to garner enough ++ votes for them that it stops anything else having a chance to break into the category.
But a bit of searching suggests that wasn't the purpose. See Random Top Nodes for the original proposal, and Renovating Best Nodes for the announcement.
Hugo
In reply to Re: Selected Best Nodes ain't the best
by hv
in thread Selected Best Nodes ain't the best
by GrandFather
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