Manager and Promoter bonuses can be activated for either gold (longer period) or for free (limited period).
Bonuses provided by the Manager increase (4x) base reward for the race and double Engine Upgrade Kit rewards in Live Race with bets. Base reward for the race depends on the license (class) of your car.
Promoter bonus doubles Upgrade Kits rewards in the Live Race with Bets. Besides that, you can ask Promoter to unlock Club Tournament and Drivers Battle Race.
To access Promoter & Manager screens, head to the main menu – Seasons tab and use the following buttons on the top right.