Yes, if she's already into you, then she can't really autoreject - or she can, and she'll come back into the picture later. This model is applicable to social circle, a girl in a friend's group, or a girl you'll see fairly frequently over and over.
But if she's a cold approach girl, or you meet her on Tinder or something.... one big mistake and you're out (if she's not attracted enough)!
So in conclusion, attraction and auto-rejection are opposites. Auto-rejection is a function of loss of attraction, and these bad boys you speak of are masters of attraction.