Mind...booting out floaters and keeping the good players at the end, is not especially good strategy. Might make for better TV; but is crap strategy. If I was Jeff, getting rid of Danielle makes perfect sense; as does Kalia's gunning for him. If I was playing, going into the final three with, say, Porsche and Adam is ideal. Which is the flaw, as I've argued in the Survivor threads time and time again, with games like this.
If anybody watched The Weakest Link, you saw this happen a lot. Contestants started to vote out, not the weakest, but the strongest link.
Of course knowing all this, contestants need to change their strategy. Which is why, I think Shelly is in a good position now. It's obvious she never tried to win anything at all, thus removing any targets from her back; and now is in good shape. If she makes the final three, say, with Kalia and Porsche, she will undoubtedly win.