The biggest scouting network in the world. Ok, its just fans and not professional scouts but these fans are generally season ticket holders working to guidelines and there are over 1,500 of them around the world.
An example of what I said before Everton are one of a number of teams to use FM to scout...
http://www.mirrorfootball.co.uk/news/Everton-using-Football-Manager-computer-game-article33798.html
Obviously this will just be an initial tool to identify players. They would then send an actual scout to see the player in the flesh.