In those instances, you are simply asking them to work harder for something they don't (yet) want.Therefore, it is better to be more agreeable, pleasant, and straightforward—increasing liking.
Fortunately, there are many ways to reach the same goal.And this is in spite I am young, educated, attractive woman with good manners and temper. Yes, sometimes too much of that type of behavior can lead to hard feelings and a strained relationship.However, without any such flirting/teasing behavior, relationships turn stale, boring, and lose passion.To turn yourself into some sort of prize and see your value drop to zero once the prize is claimed? Why hasn't the study also investigated what happens next as a consequence of game playing? It seems like a poor advice but in real life it is not.At least my experience as young woman with young men.