Because their products are in the dark ages. And semi-monopolistic. The requirements are incomprehensible, the pricing is highly variable. The combination of needless complexity and high cost means the easiest way to find this stuff out is having a team of sales reps fly out to confuse you further.

One of the Bb products we use (transact/envision/cash registers), they basically ship you the server with the software, and updates are handled by their techs. We actually resorted to disk-to-disk type cloning of that server to give ourselves a backout plan for when their engineers break stuff.