Depends upon the Book as far as Teasers lose on pushes. I almost always find a Book where ties win. There are quite a few here in Vegas where ties win.With teasers (if you play around with them), I think it is important to buy the half to get it off the full number (Going from say 10 to 10 1/2)
Pushes lose on a tease, and it is only juice if it loses. If that sucker lands on 10 on it is a loss, it would not be good considering at 10 1/ 2 it would have been + money.
Just my humble opinion.
I don't know why so many people buy points.....its a big waste of money and in the long run it costs you big...
almost never do it, maybe twice a year.