The "yield" management IMO is virtually non existent in a micro sense. Once a flt is booked beyond a certain capacity,whatever that might be in AC's eyes, Ithink they just start zeroing out all the cheap seats along with I class and let the flt controller or local airport people run it from there if its an AC station.

I don't think there is any other logic or planned approach to it There won't be any more logic to it until their IT system has expanded much further than it takes them right now.