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In regards to the "above average" suggestion, most likely an author's "replies" to other posts would be much less valuable, but her "blogs" would be more valuable, so a strategy for bots would be: up-vote "blogs", ignore "replies".

Another example: an author is good at writing "funny" posts but not good at writing "serious" posts, so bots vote for her "funny" posts and ignore "serious" posts.

My 2 cents.

Another example: an author is good at writing "funny" posts but not good at writing "serious" posts, so bots vote for her "funny" posts and ignore "serious" posts.

That would be correct curation and would add value.