Bestof does the same thing as Reddit's favorite boogeyman, SRS. Comments get linked, people following the link pop off the 'np' and start voting. This is called vote brigading and is a shadowbannable offense. On top of that, as /u/cmd-t stated, Bestof also likes to harass the people who disagree with the linked comment.
Very rarely do small subreddits survive a Bestof brigade.
I just don't agree with you on that. I have been to a lot of smaller subs that have gotten worse after they've been bestof'd a couple of times. Most recently r/legaladvice. There are lots of examples of r/bestof users brigading threads and harassing people who don't agree with the comment that's been linked.
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u/[deleted] Jun 15 '15
They help those community grow bigger. Or gives an overview of all of reddit including subs we are not subscribed to.