I am not following, I guess. If curation is allotted 25% of the total rewards for a post, and (in the example you gave) where only one vote applies, then for a $100 post, that vote would seem to be worth $25, regardless of timing.
In a real world situation, where there are likely to be many votes on a $100 post, then the timing of the vote would clearly change that, due to the allocation you mention.
Right?
Yes, correctly, it would allocate more to the Author if it was within the 30 minute mark.
Downvoting a post can decrease pending rewards and make it less visible. Common reasons:
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