It doesn't have leveling system-perks because it is GT > you'd want ABS perk for l.5 ? biger turbo perk for l.20 ? beter driving skills perk for l 30 ? overtake 2 cars at once perk for l 40 ? Racing tires perk for l.45 ? NFS?
Whole game is based on making money in races . That's that .Simple.
Glitchin 20 millions defeats whole purpose of the game >
racing to make money and then
enjoy in spending It on cars and upgrades. That gives much biger reward /satisfaction than just glitchin a lot of money and then buy/drive whatever you want without any work/grind.
Don't have problem with those who glitched , but then many later complaint game lacks content or it is boring. For sure there's no challenge when you can have 400 (or 1200) cars in a garage for free. Game wasn't meant to be played like that