The Brigade are dominating the game and it's ridiculous. Next week, they will officially be half of the house. It will be easier for them to win competitions now, and even if they lose them, it's very unlikely that two Brigade members will be on the block against each other, it will only be one, so they still control the votes. And no-one knows about them! A couple of people like Ragan or Britney may have some vague clue about them, but they're not really determined enough to take them down yet.
The only scenario where any of them might go next week is if Britney/Ragan/Kathy is HOH, and if Brendon wins the POV.