perhaps, this is a new marketing strategy. maybe they got the conclusion that this is : "more regional hence limited productions" based on their past experiences and sales record of the other iconic buildings on the architecture line such as burj khalifa, etc.
maybe this is the first of many? who knows next time they start adding for example the Sagrada Familia in Spain, and make it a limited edition, available in Europe only?
Just maybe....
my 2 cents.