I meant "who cares about the majority" as in saying I think it's irrelevant to me whether a car is popular or not ( as I decide myself what I prefer, regarding any matter not just a game, regardless whether it's popular or not ).
GT always supplied to both the majority and the minority, the variety not always used or appreciated by anyone is one of its greatest assets and the fact this is now devided by a two-tier system instead of all cars being equal makes that the majority is now probably better off anyway ( given your assumption that the majority will only play a small amount of new supercars/racecars which might indeed be the case ).
As for GT being all about commerce, that depends on how you look at things I suppose.
If you regard a game as just another common commodity ( like a TV set or vacuum cleaner, etc. ) the sales will also be dependant on delivering quality which in turn also partly secure, through reputation, good future sales.
You can also view a game like a movie or music album whereby artistic creativity and productivity ( combined to make a subjective quality ) is the main sales argument.
Sure there are purely commercial movies and musicians as well, but in my opinion the best artists offer a genuine piece of art which can also be succesful without "selling out".
I think GT is one of those rare artistic celebrations of a corporate product ( meaning cars ) backed up by a corporate enterprise ( Sony ) without being a blatant and biased promotional tool and with its own vision and intergrity.
Which in the way it does things differently than its predecessors, created an original and genuine "piece of art" which became incredibly succesful.
Not doing things which until then seemed the best way to succes but doing things their way which became succesful for just doing it their way.
But succes creates pressure ( by Sony but also the bar being raised by themselves ) and the insane amount of money invested needs ofcourse to be earned back by the sales GT5 will make.
So commercial? Yes no doubt. Only commercial? If they were only commercial they probably weren't having the succes they're having now.
The majority also pay for the content only used by a minority, only wished this fact wasn't displayed so blatantly obvious with Premium and Standard cars.