Putting aside the "My ones bigger than yours" crap.
IMHO
I believe the cause for the lack of profit share is a) allocation of funds to lower available profit and b) the slapping on of ridiculous amounts of ADD FUEL on top of STAT CONT on nearly every OFP.
Roughly 400 flights a day wilt a significant number being loaded with un-needed ADD FUEL.
The amount of money being thrown away out of the tailpipes just to carry ADD FUEL is staggering.