Yes it is very sad that even in the world of cryptocurrency, greed is the motivation. I feel that there is enough bitcoin and steem dollars to share and everyone eat. As far as positive/negative voting, as we see, money gets the winning vote. I feel that it doesn't matter who votes for who, in our society, whoever has the most money wins unfortunately. Buying votes has been done for years by candidates, and I just don't see it changing now.