I think he's just playing it really well. Given what just happened, it wouldn't make any sense for him to break away from the Quack Pack. But now, with Boogie gone, he will be Frank's #1 confidant and ally (at least in Frank's mind). If F/A/Je win HOH, he's safe. And the QP won't get upset/suspicious if/when he spends a bunch of time with the other side of the house as long as he keeps feeding them info. If D/D/B win HOH, he's safe. And when he acts the way he is now, the F/A/Je alliance won't suspect he's working with S/B/D/D. And if Ian continues to act like this, it will be hard for F/A/J to suspect he's in the QP even if he doesn't get put up by the QP. Ian's only wild card is Joe, which gives him good odds, especially since the rest of the QP would be in Joe's ear about who to put up and would formulate an argument against putting Ian up. Until he wins HOH or POV and has to make a public move, he is sitting pretty with both sides of the house. If he doesn't win a comp, he is almost assured as spot in the F3 (b/c eventually, D/D and B/S are going to turn on each other).