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I understood it differently. It could be that i need to watch it again or I am just to unexperienced but.
I think he said:
There is a big delegator (@misterdelegation) who is delegating super much power to new accounts - like @dtube. When these normally small accounts vote with the delgated SP, they will generate their own steem power from curation rewards and become whales by time.


and so on.When they are whales, @misterdelegation can use this SP for creating other whales with this concept. And @dtube for excample can delegate to another user and build a new whale.

He never said that the big account is voting by himself. Was he ?