I don't mind games including an option to buy your way through the game, as long as the core mechanic of earning in game cash and buying new cars is unaffected. It is cheating, but if people are dumb enough to spend actual money on virtual cars, let them have the option to do so. Haven't played Forza 5 yet, so I don't know if the game forces You to grind longer to get the cars with in game cash. I have a feeling it does.
Soon enough:
- cars You get as a prize for winning races/championships will be gone,
- winning races will hardly pay for repairing car damage, you will need to grind for days to afford a single upgrade or towards a more competitive car,
- races will become increasingly more difficult to win without constantly upgrading your car,
- AI cars will attempt to inflict as much damage on Your car as possible to make saving up for cars even more difficult,
- you will need to spend cash to enter races,
- there will be a limit as to how many races you can do during a set period of time to discourage grinders further,
- timers that You can skip by spending tokens,
In short, Forza and possibly GT will be a lot more like Real Racing 3 in the future and I will be playing something else instead.