I think SA should be awarded at random based on experience after a player has gained a certain amount of skill point from training and matches.

e.g if a player plays as a winger & is a serial goalscorer and you assign cones heavily on his attacking skills, then after some number hidden points have been reached, he automatically gets a shadow striker ability

Nordeus can still make money from tokens if they sell SAs for a fixed amount of tokens. Just saying.