I prefer manual curation and tend to read the post before voting. Vote buyers? They can buy any amount of votes or set any wanted payout for their posts. Do they really need my additional 1 cent? Perhaps a person who has only 20 votes will appreciate it more than the one who has 200+ votes...
I like to see the rewards spread a bit further. I'm not sure it's great for Steemit at this stage to have most of them going to a very few people.