I do not usually read higher awarded posts but sometimes a topic catches my attention.
It is just common courtesy to comment and upvote a post you read if you liked it. Rarely do I read something that I do not do this with. I am on a trail so those upvoted through the trail usually do not get commented on.
Agreed, as I mentioned I did this from day 1. I also remember emptying my VP pool before I knew what I was doing!