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It is because most of his activity is voting for himself and all his money comes from himself and another whale. He is also taking 3.67% of the SteemIt reward pool. This is causing Steem to not circulate through the market and could lead to Steem ultimate demise.

I think I'm going to give @haejin another upvote

it's because he is making a dent in the income of berniesanders&co and their upvoting scam business like randowhale so they re trying to suppress him by force and spam .