If you don't vote for them it won't change their winning chances either. Even if you voted for a girl that could win it isn't guaranteed she will win, you know? I vote because I WANT her to win, despite her chances.
I vote daily. There are two girls I give my daily votes too in all categories, and that leaves me two votes left. Those I give to girls I want to support because they interact with fans on this board all year long. Even if I'm not that into them. It's a way of saying that I like what they are doing and how it should be. That instead of showing up for the contest and asking for votes, that I like it when a fan can reach out when there is nothing to be gained as well. It's always been a two way direction: we are nothing without these girls, but these girls are nothing without their fans.