The FAA and UPS Flt Ops have a procedure in place. It would be nice for all employees to have this benefit but these seats are for pilots going to work or home. Jumpseats are included in contracts for "benefits", but remember that UPS and the Govt controls the seats.
Yep, they qualify, they are on "company business", but Pilots use the seats to get to and from work or personnel travel. The use of jumpseats is really a pain in the ass, I have been bumped several times, believe me its not worth what you think it is.
If you're an Airline employee, you can jumpseat for personal pleasure. Yes, you are subject to being bumped at any time. The key is 1) flying to places where pilots don't live 2) flying on days when the liklihood is reduced and/or 3) having a backup flight (via reduced airfare w/other airline benefits) in hand. Some people love it -- it helps if you're single and don't mind the fact that most flights take off at ungodly hours.