The pulley rein is not the same as a one rein stop. The one rein stop is shortening one rein excessively to bring the horse's head around to your knee. The pulley rein is placing one hand, say the left very low on the neck as a brace, then pulling up and back with the right. This twists the horse's head rather than bending the neck.
The pulley rein works and well. I have not had to use it on a bolting horse, thankfully, and I think on a true bolt it would actually throw the horse to the ground if done too quickly. I have practiced it a few times first at a walk, then a trot and tried at a canter, but by then my horse would have none of it and as soon as she felt it coming, she would slow down or stop. That was the end of practice.
Anyway, I am a true follower of the pulley rein, as the ORS will not work effectively on narrow trails. The horse will run into the bush and take my legs off. Been there, done that. The pulley rein makes them have to stop without any turning first. Now, if I am on a runaway I would likely not be too agressive with the pulley rein initially. I would want to warn the horse what's coming before I just yank his balance out from under him. However, it's only a split second warning.
I would not let a horse run himself out. Who has 2 km of trail or roadway or fields that are known to be safe? And running himself out does not teach the horse that he has listen to me. Nope, if I want to stop, that dang horse is going to stop.
Bolters are different. Way different. My sister rode one that bolted -- ran right through a fence and my sister bailed before he hit the barn. That's some scarey stuff right there. I would not ride a known bolter. I'd sooner ride a rearer. Yikes.