yes, they could definitely be getting that type of treemail, VG. The only reason to believe it's NOT a TC cancellation is the CBS teaser states there is a TC. So I lean towards the mail as notifying them that there IS going to be TC, which was perhaps in doubt for them?Christina running could definitely be something else, although these folks don't have much energy, so I don't see why she would run unless time is of the essence.
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Re timeline:
FP, I don't think we can know whether one boot or two works, because jurors can be pre-merge, and they could do it such that the first person out tonight (if there are two) is pre-juror, but the second person is jury. Or there could be one person out, non-juror. Or two non-jurors and it's a F10.
However, if it's a 14 episode season, as per usual, with a F3, then there are normally 5 in the Finale. Counting backwards, you need 12 people in Ep 7, which means that 1 person leaving is what they would want, optimally.
If 2 people leave, they have to reduce the number of players in the Finale to 4.
So I would say they will NOT want two people to leave, and would most likely cancel the vote if they have a confirmed permanent removal.
Someone please correct if those numbers are wrong.