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Is delegation in itself is a manipulation or a fraud?
If so, why?
He is delegated mainly by blocktrades and minority-report.
steemworld is the only tool I know about to check delegations directly aside from tedious search using a blockchain explorer, or programming and running a program for this purpose.
Last time that I checked blocktrades was not voted for his witness, but it probably does so indirectly by forcing others to vote for his witness in return to delegations or discount in delegation price or some other arrangement.