I've been told it runs by a score but I'm a little doubtful. I've heard it runs like this;
POV = +1 to your score
Nominated for Eviction = -1 to your score
I've been in two games recently that the winner seemed almost random. One was someone who had never won a POV and was nominated three times and the person who got second got two POVs and was never nominated for eviction.
Then there's a game that I was in the final three. I won POV every other day after day four and was never put up for eviction when my competitors had never been put up for eviction but had won POVs once or twice. I was put in third place.
So is winning random? Or do other things factor in who wins?
