I don't know that I've ever seen the roof rack load limit expressed in that way. All the load factors I've ever seen had a single number, and I always assumed that it related to being able to drive the vehicle safely without finding yourself on your side in otherwise normal turns or maneuvers. In other words, dynamic. I'm sure they all hold a great deal more than what is safe to drive with.
The 200 pound number seems quite high. Apparently there is an "operator caution card" intended to be placed in the glove box with the manual, but I didn't see mine, and the manual has no reference to the roof load, only to the total load capacity.
Remember that this vehicle sits up really high, has a spare tire mounted up high on its rear, and not much weight down low behind the rear wheels. If I had a lot of weight on the roof, I would drive with great caution.