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I think many use a curation tool from http://www.steemtools.com, but I'm not sure because I have never used a voting bot. What I do know is those tools need your private key, so I avoid them entirely.

If someone has an automated voting tool, they simply add the username of the people they wish to auto vote and then everything the people in the list post will be voted.

Ok i c. I was thinking that it was the system that puts people on automated upvotes.

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