Hi, I have seen in some games there are certain virtual goods that a player can buy only after some achievement or action in the game. For example, if you buy pass 5,000 points you unlock the ability to buy a new powerup or there is one item that unlocks a better version of the same item.
I want to implement that in my game and it seems like Google and Apple will only offer two kinds of items - managable and unmanagable (consumable) but non of them really have this functionality.