The IPT used the three foul rule in their eight ball.
I didn't see very many IPT matches so I really have no idea how this played out but I can't imagine this rule was any good. Botched run-out attempts are common in 8ball, even on the pro level. Admittedly, you fail to run-out in 8ball (pocket all of your group and miss 8) against a pro, you're likely going to lose anyway but with a 3foul rule, the probability is almost certain. In my opinion, part of the beauty of 8ball has to do with the ability to foul without any more penalty than ball-in-hand.