Keep preaching the truth.. that's exactly how I got some of the people on my side who's upvote is worth something.. by leaving thoughtful comments and engaging them in conversation about their post... people love to talk about themselves when given the opportunity... giving them that opportunity... or even better yet encouraging that opportunity can be very profitable.. plus the relationships that get built are amazing...

I also upvote comments on my blog according to how thoughtful and meaningful they are... I think that is the best way.. people who get a .01 upvote will wonder why a different person got .15 ... when they read the comment they know why and hopefully it teaches them that better comments equal better upvote..