I don't like that version of (1) because the comment threads will be separated and the statistics for the combined post will be split up, making the content less discoverable, and the mirror poster will get full credit, as though it were their own content.
And, yeah, for (2) I had previously thought about starting the new clock with the first zap that launched the post back into top status. That's not quite right, though, because if someone else zapped it a few minutes before me but not enough to cross that threshold they wouldn't get credit for being earlier and they should.
I don't like that version of (1) because the comment threads will be separated and the statistics for the combined post will be split up, making the content less discoverable, and the mirror poster will get full credit, as though it were their own content.
And, yeah, for (2) I had previously thought about starting the new clock with the first zap that launched the post back into top status. That's not quite right, though, because if someone else zapped it a few minutes before me but not enough to cross that threshold they wouldn't get credit for being earlier and they should.