Jack
Yes, it's the cost of promoting a young driver. If you have a sponsor that awards 3 tokens a day then you could promote 3 youth drivers per season (for free) and still have extra tokens to spare.
@Jack i have Sponsors with 3 Tokens, still the 15 tokens were used for Promoting my Youth Academy Driver.
Also i can see my Well developed Driver from long time is taking less wages compare to my Youth academy driver developed by myself, can you look into this proportion as well at least for couple of season he should be serving his team where he developed without any wages/ fees