Why are jump seats placed in the flight deck anyway? I can see the need for one where a Check Airman could be seated but more than one is unnecessary.
As a wanabee, working as Ground Staff, I was denied the use of a jumpseat because the Captain declared that the seats were for crew only and in any case. it was where the crew placed their coats and bags ! (Blimey, I think he just didn't like me).
Later in my years, having made the transition to pilot, I worked for an airline that had an incident related to a senior member of management "insisting" on the use of a jumpseat. We were subsequently ruled that the jumpseats were no longer to be considered as an "extension to the passenger cabin". Moreover, after 9-11, my employer banned the use of these seats other than to Check Airmen or members of the Regulatory Authority conducting inspection flights. The ban was heavily enforced and staff were not even allowed to "request" the use of a jumpseat on full flights.
I get the overview from previous posts that the use of Flight Deck Jumpseats as a passenger seat appears widespread or is it just for company staff ?