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I don't understand all the intricacies, but hate the idea that you can get votes by paying for it (that's basically how most of them work). It's just another case of the rich get richer..there are some other kinds of voting bots that you don't have to pay for. These are better because they can involve manual curation of posts, like steemfollower. Some say that bots are necessary for the Steemit ecosystem, I agree within the limit that it's not all automated. But there is definitely room for improvement as you say!
https://steemfollower.com/?r=8984