All I can induce from this post is that those who go about flagging other people's activity do so to make themselves noticeable and relevant at the expense of other people. The ones who upvote their own comments are no different and I can't understand them either. They all want to make themselves richer and tend to not care about other people.
Another category is the people who just won't upvote or comment no matter how good your content is.
All of these unhealthy business habits must immediately be addressed and pretty soon.