Ráguglizva több helyen is azt írják, hogy úgy működik mint a malacpersely:

You're essentially putting aside an amount of money every week during the season. At the end of the year, after you get your prize money, you get that saved money back on top. That's your fund to start working on next year's car.

You're not investing that money, or using it to design components as you go, you're just putting it in a shoebox under the bed for a year.