They are to help other players get good minutes for good gameshape. I played 2 league games and after that some players (who was in backup) did not get enough minutes. Like I mentioned above. Without 5 crappy players those 5 good players will play 48 minutes scrimmage. But Your idea is worth checking out. Also those 5 players are native with very small salaries 1.5-1.7k. I was testing merchandise influence.