The long haul use of the jump seat for non-company folks can be problematic as having someone occupy the jump seats for many hours can be tiresome for everyone. I always thought the use of the flight deck seats was the back-up for company pilots when the cabin was full. If some competitor pilots are too cheap to buy a Z fare for personal business, then they can’t afford to travel and shouldn’t be allowed the privilege of the reciprocal jump seat agreement especially if it’s not on an equal footing.
Rebel
In todays environment, it is impossible to have "non company folks" in the flight deck, so I don't see the problem of having someone in your jump seat for long periods of time. Even if a company pilot or F/A requests it and is allowed to be there, the Captain still has final say if he/she is willing to have an extra body in the flight deck. Some appreciate the extra pair of eyes.
As for pilots being too cheap to buy a Zed fare, well I don't really get that. Jump seating has been a huge benefit for many years, particularly to commuters. It is not about being cheap. If WJ wants to charge for the benefit, well that is really their prerogative don't you think? It is up to Air Canada to decide whether or not they want to allow Westjet a reciprocal. Obviously, we decided the charge was small enough that the benefit was still worth it. One advantage for AC pilots jump seating on WJ for example is that WJ does not over sell their flights, so no guessing game on how many seats may or may not open up last minute. To some, this is worth the 20 bucks right there.
If you don't like the charge, then I would suggest you convey your concerns to the jump seat committee.

