I think people might have been a little upset to find that they needed to pay a further $949.01 to access all the parts of the course :)

You have to look at the market. People that buy this app are going to be "in the know" and be serious about the bar exam and thus willing to spend some serious time AND money preparing for it. For the target audience this is not random purchase.

Not to mention that they're going to need nearly all of the material in order to properly study, so it doesn't make much sense to break it into pieces (at least in the case of the bar exam).