if you asked me what is the common nature of human being? "Greed". everybody wants to survive in steemit game economy, they do whatever it takes, because they don't have a talent, and they became an investor rather than a blogger, just as myself, no time for writing a quality content, because steemit is just my part time job, maybe someday i'll quit my job and focus on writing a quality content, i know the risk even writing a quality usually won't get notice, so people buy some upvote just to get attention from their hardwork they spend.