That is fine, and it may fix peoples idea of entitlement, but it really honestly has absolutely nothing to do with curation. This will not fix curation. It will not help the good content to rise to the top. All this does is fix the greed of entitlement.
Curation is about selecting post a person thinks is of high quality in their eyes and thus they vote for it. They do not time their vote, they vote when they read and see it. The above does nothing to curb vote bots, or vote buying, or vote trail activity. It changes nothing, and fixes nothing other than the greedy feeling they deserve more rewards for their votes.
If you want to cure what ails the curation issue, perhaps looking into randomizing the start time for the curation reward pay out. Yes it ends on day seven, but you can fix the formula to where the payout schedule starts at any point along that 7 day window, not just at the start of when the post was posted.
That would negate most of the bot activity and selling of votes, because someone with a smaller account may get more curation rewards than someone with a larger account, so it is not likely to happen.
You are absolutely correct. In reply to the OP below I propose mechanisms I think you would approve. Have a look if you're willing and let me know what you really think.
I flag trash. You have received a flag.