One of my Hubs has been viewed over 20 times, as of yet it doesn't appear that anyone has voted - up, down and no comments. Most of us would like to hear what the world has to say, even if it's negative. Any comment is better than none.
For me, sometimes I read but do not comment or vote, due to the fact that I have no comment to make or that I am undecided how I want to rate the hub. It's status quo kind of thing, so it may be better not to make any comment at all, in my opinion.
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