i don't think that it is possible to make this specials more frequently, because a) it gets harder to come up with stuff that intense and provocative and b) they must be terribly time consuming. imagine how much planning and conseration is involved in this one for example. apart from the planning alone, you need to think yourself through every possible contestants behavior at every single point of the event. there coud be 1000s of things happening, that stray from the plan, that all have to be considered.