The idea of a strike is to put an economic hardship on the company to compel them to negotiate a contract with you. If "Amerijets cargo" is moving on another aircraft and they are still deriving a profit then that is struck freight and should not be moved. If the freight forwarders are simply moving their product on another airline that is fine, the strike is doing what it is intended to do. The question that needs to be answered before you call someone a scab is "Did Amerijet make money off of this flight?"