We are at this weekends season update removing the pay feature "hidden skills" from the player profiles.
The reason:
1) We want to confront users with as FEW pay to play features as possible
2) It gave an advantage to those user who wanted to pay 30 Pro to reveal the hidden skills.
3) All hidden skills can still be evaluated through scouting and player history for all players at no Pro cost.
All hidden skills which have been paid for before the upcoming season update will stay visible on the players' profiles until the players retire.
NOTE! Hidden skills are still part of the game, they just won't be visible on the player profile skill page.