I once thought about this, my 100% upvote at the moment is $0.003, but I always make sure upvote whatever post am commenting on.
A discussion between @tolustx & myself touched this matter raised by @kartiksingh, that is not upvoting a post one is commenting on or causing chaos with too many comments and replies from the same user: he said, "only greed will move one to act in a such a absurd manner".
I solidly concur with what he said because "it's nothing but greed."