If you use Linked Products ... but set a Sale via SaleMaker on the BlowOut Category ... by switching all the Products to use the master_categories_id for the BlowOut Category then all of the Products would get the Sale from SaleMaker ...

On the Copy there is the button to the:
Multiple Categories Link Manager

The Products to Multiple Categories Link Manager allows you to reset all Products within a Category (that includes those that are Linked) to have a new master_categories_id ...

Reset ALL Products in the selected Category to use the selected Category as the new Master Categories ID ...
Example: Resetting Category 22 would set ALL Products in Category 22 to use Category 22 as the Master Category ID
Reset the Master Categories ID for All Products in Category: