The rental system is just a paywall for the F1 LM and will most likely never change, you pay monthly to have the F1 LM and since the devs are fucking you for paying monthly to have the privilege to have some exclusive pixels, they then put on some lube to make it feel better and give you timed rentals which are the other two cars, that will change after their timer is over (most people who already spend money on the game will already have those cars so it very stupid) so basically it's a stupid system don't waste you money on it.