Packs of every colour actually expire???
People say conspiracy theories regarding this topic, but actually, its a very likely thing.
Think about it. Tokens = money to Nordeus. You have to program the odds of getting an injury in training and game situations. Is it that hard to believe that they can increase the odds at any given time, for any given team in order to increase the odds that the person will use the red/blue/green packs and/or tokens?
I think that anyone that says that this is not possible has their head buried in the sand. Nordeus created this game to make money, not give out fake online trophies to the best managers.
So the question remains: Do you think they program it so that when you have many red packs, the odds are greater for injuries during training and during the game?