Sort:  

Thank you @vikisecrets for your comment. I just upvote 1%, which is $0 where I am at because it's a fast way to mark comments I have read, and not waste time going to them again when I see on the "Replies" tab a comment that I have not upvoted. Maybe this makes more sense now.

Oh thx for the explanation, how about downvoting spam comments instead (not sure whether this is possible with 1% too, have to try it;) in order to mark them read? Even if a 1% upvote seems like $0 it can still add up and even increase the reputation of spammers.