Stars are used to unlock Seasons. Also, certain Events in each Season are locked with Stars.
Each Career Season can be accessed instantly by purchasing a Season Unlock from the Season page. Purchasing a Season Unlock also opens all events in that Season. Stars themselves, however, cannot be purchased.
Each Career Season can be accessed instantly by purchasing a Season Unlock from the Season page. Purchasing a Season Unlock also opens all events in that Season. Stars themselves, however, cannot be purchased.