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I see, some ninja mined stake shared by many users to punish little guys who paid for their HIVE? Disgusting, who are these users? You and..., give me some usernames

Ninja mined stake = stake that was mined when Steemit rolled back previous legit mining and restarted it before giving community miners a chance, therefore creating the giant Steemit stake with no competition. Previously mined stake was erased by them.