Why is the skybuilder mat exchange ratio 10:10?

[Bsrking5]

Because the scrip rewards are smaller than 1 scrip per item for MIN/BTN. Only the 2-star mats have a scrip amount that could be exchanged at a 1:1 ratio of item for scrip. Note that the fisher items can be turned in 1 at a time and their scrip rewards start at 1 scrip per fish.

Those 2 star mats also have the 10:10 exchange thou...