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Renting delegation isn't pushing down the price, selling the steem gained by renting delegation is pushing down the price.
The roi maximizers are cutting their own throats, but they have their principal back and don't care what happens to steem as long as they get a few dollars more.
The blockchain records their acts, one day we will shame them from the platform.

That's very different to steemits stance before. They refused rewards from delegating to steemhunt, dtube and utopian, email etc. Since it's premine stake, they aren't supposed to make money off of it.

Too late,...

Steem is being used as their personal self filling piggy bank.
It's been this way from the beginning.