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Yes, I see what appears to be a guy who was not part of the ninja mine but instead bought a f**k tonne of steem a few months back. He has no obvious connection to @haejin that I can see.

Should I be checking for something in particular?

Check this whale activite with other whales. Try to find a pattern...
Also, try to cross dates of when this whale buy steem, and when it starts voting for haejin