He never said he thinks it will save them...quite the opposite. He said it was freddie, then bea, now him and if there was another week it would be marcus nominated.
All he did was remove himself from the process that was now of no consequence seeing as the block vote would always win....and it has. There no longer was a game to play. The least popular hm's will be booted out one by one on final night to a booing crowd...some victory
It's a good move and far from back fire it has worked as he said....it would either be marcus/david/siavash OR marcus/siavash....and he stated very clearly he was willing to take the gamble on going head to head with marcus, as he didnt want an easy end to the show.....loud and clear tonight in the diary room.....
If he goes out this friday he gets a week of exposure to himself, better than being an also ran rushed out amongst the glut on final night, and he'll be back a week later for the final show. If he survives he could win the show.
He has very cleverly engineered himself with a win/win situation.