I think one of the bigger concerns is that larger accounts can obliterate earnings for someone they don’t like. Having a separate pool helps in that they can obliterate without cost to themselves. Perhaps the downvote can be a one person, one vote system rather than a percentage of SP. This gives the smaller accounts some opportunity to successfully downvote unremarkable content by bigger accounts, removing the immunity from losing rewards they would otherwise have. For example, if your self vote is worth $2.40 and a downvote from a small account is worth $0.001, you can afford many downvotes without concern.
A one person, one vote system could work on percentages. Your self vote and one downvote would be worth 50% of the reward. One self vote and two downvotes would be worth 33% of the reward. The percentages would be based on the ratio of upvotes to downvotes. This would also prevent a bunch of big accounts helping each other out with massive votes as the dishonest upvotes would also get cut by the ratio of upvotes to downvotes.
For example, 3 big accounts vote up a post to $4 and 6 smaller accounts downvote. Total 9 accounts. That’s 33% ratio. Reward goes down to $1.33.
Since it’s going to be a separate pool of downvotes anyway, they should operate differently too.
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