Gill be on this no doubt and update the rules!
"The absence of transfer fees between A-League clubs means Melbourne City can sign a player like Mooy for nothing and then gift him to Manchester, only for the parent organisation to receive a fee when the player’s registration is eventually transferred to a club outside the group’s ownership. It is a brilliant investment strategy, pump primed by the best facilities, coaching staff and scouting networks to incubate talent. The CFG has effectively turned the A-League into a de facto academy."
Not sure I would go that far. Mooy has does well to cross from A League to Championship and then more than likely Premier League but he may be the only one for a while.