The fact that the game offers no alternatives to unlock new cars, tracks, and features is why I have given the game three stars. It is one thing to have to grind on a game to earn, and unlock new content, but it is a bit greedy on the part of the developer to require a paid online subscription to do the same thing.
https://www.amazon.com/Gran-Turismo-Sport-Hits-PlayStation-4/dp/B07XQR6F59