Certain accolades can be achieved during multiplayer races which would increases the credit payout at the end of the race.
Accolades would include getting the fastest lap, finishing a race with no collision’s, amount of people you overtake in a race etc.
The bonuses could be applied as a percentage multiplier at the end of the race for example finishing a race with no collisions could give you a 50% credit boost, fastest lap could be worth 10% and overtakes could be 1% for every unique overtake so no overtaking the same person constantly.