Pretty sure that SA are cosmetic or have a very small effect in game, also suspect that the 10% bonus thing is a myth and doesn t work also.
Alot of people say that. But when I look at the some of the very successful managers through associations. Their players all have SAs. Small effect but 30 plus greens isn't much when you average out over 5-6 seasons. since it doesn't cost much to train, why not?