The house of cards clue was posted between ep2 and ep3.

There was much Parvati talk after that clue, as shown here:
http://survivorsucks.yuku.com/topic/26793?page=1

ProbstFan123 even said:
"So if history repeats itself, Parvati should be the overwhelming edgic pick by this time next week."

The house of cards clue was posted between ep2 and ep3.

Ep2 Parv was 36% winner.
Ep3 Parv was 72% winner.

Winner picks don't have to be spoiled by a concrete spoiler. Winner picks can be spoiled by discussions about clues from someone suspected of knowing the outcome.