You can literally spend real money to get "perks" which increase handling, xp gain etc. You can also buy what looks to be most cars and parts in the game with "crew credits" as well. These are bought through microtransactions. It does look like some of them are so outlandishly priced that you'd never pay for them with real money but I'll say the same thing I've said before. Microtransactions in full priced releases are not ok because I can't trust you not to screw with the progression curve in order to "encourage" me to pay to accelerate it. Goddamnit Ubisoft.