This is a good general summary to which I will add only one footnote (mentioned elsewhere) which is that insurance policies are negotiable and are not all the same. While the described insurance is likely present in all off-B productions and many if not most Broadway productions, it is not universal. Disney almost certainly does not insure in this way and there may well be other producers doing something similar (Mackintosh coming quickly to mind). And likewise there is no set policy for theatre landlords any more than for any landlord but the nature of the beast is such that the primary focus is on property not revenue but they do not have to buy a product off the shelf although it sounds like Jujamcyn mostly did.
Just to add, the Shubert Organization also "invests" in many, if not most, of the shows in its houses. I imagine they would also have some type of modification to the insurance as described above. I imagine Jujamcyn and Nederlander do as well, but I'm not sure if it is as prolific as it is with the Shuberts.
