"linear and low curation is a bad idea because it leads to content indifferent profit maximization voting behavior (ie self voting and vote selling)."
That's not factually correct. Curation rewards fundamentally encourage content agnosticism and financial manipulation of voting to maximize rewards extraction IN ADDITION to self voting and vote selling. You can verify this by considering whether any minnow ever gamed curation for rewards, without doing either of the others. Someone might have, but it's so small a financial return for small stakeholders they didn't do it for long.
Curation rewards are only significant incentive to game for financial rewards. They do not encourage anyone to curate content qualitatively, and since author rewards are highly gamable, are essentially merely additional incentive to game author rewards. They don't even matter to folks without substantial stake, and no one with substantial stake is able to curate both for content quality (actual curation) and maximize financial extraction. Folks intent on ROI ignore quality for gamability.
All curation rewards are counterproductive to curative purposes. Even if 99% of rewards were curation rewards, this would not change. Conflating curation with extractive mechanisms replaces content quality with financial return as incentive to vote, no matter what the curation rewards rate.
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