Complex sentence: Members of the Lost Millennium have their Fractale Terminals removed to prevent them from being controlled by the system, but it cuts them off from the benefits it provides, like automatic health care; and seeing and hearing Doppels can only be done by using special glasses.
Split into simpler sentences: Members of the Lost Millennium have their Fractale Terminals removed to prevent them from being controlled by the system, but it cuts them off from the benefits it provides, like automatic health care. For those without terminals, seeing and hearing Doppels can only be done by using special glasses.