The program that manages the inventory for C class is the same as the one for all other classes [J,Y,B,Q etc].

I suspect the problem is that no one has taken the time to actually work out what a good "curve" for C class should be and they have not bothered to tweak the program to release seats in a decent [our opinion] order. The agents that monitor the RM system cannot possibly follow each flight individually and they must rely on "Auto-pilot". They then follow reports from the system to go in and make adjustments as they see fit. Some agents are incredibly good at this and some are just so-so. They spend most of there time working on "problem" flights or sectors and do not look at each one.

One of the main problems with the C class route is that it is used for a number of different objectives [executive business travel, Aeroplan special awards, Upgrades, regular sales and Sales Promotions]. These are not co-operative objectives and are likely difficult to program allotments based upon history.

If C class was not the J class dumping ground then it would likely be better, but that is what Rupert was implying.