Dont believe everything you hear Britney saying, and agreeing to. She is very good at agreeing with people, and disguising her real thoughts.
Even before the nominations, she was on board to put up MAtt, because they convinced her, she was the saboteur. Then she didnt, and said, she would, if Brendon wins Veto. Now she is pissed at them because they threw the competition, and she has realised they have manipulated her.
Britney has nothing to gain, in putting up MAtt. Like some people have pointed out:
1. she has promised not to put up Brendon and did. So now, Brendon will come after her probably, and she has likely lost jury votes from Brendon, Rachel, and Kathy.
2. she has promised that she wouldnt put up Matt. Doing so, will lose her another jury vote.
3. if Matt stays in the game, thats another person the next HoH, will likely go after, other than going after her.
4. Ragan is very close with Matt and Britney, he will likely feel betrayed by her if she noms Matt!
And finally, if Matt wins HoH, she is likely safe another week.
Again, it does not add up for Britney to put up Matt at all! and I dont believe a word she is saying.
Bri