lol, i like how you get mad at them for making you pay for extra cars when thats never been said anywhere. =)
As far as I know, PD are not fond of that idea either. They want to ship a complete game, not ship semi-complete game and make DLC after the fact. Hence the many many many delays.
There are a lot of good reasons to offer DLC.
They can keep producing material well after the release of the game. There's no such thing as not enough time.
They can give us model year updates. New cars hit the streets every year. A new GT comes once every 5.
They can fix things (just via patches, not DLC that you pay for)
They can make money, and remain a viable, healthy company, that will stay in business to produce another game (and more DLC for this one).
There are also ways to minimize the costs, and impact on the consumer. Home has proven to produce millions of dollars, at as little as 0.49 cents at a time. Bundling gives the buyer a deal, when they buy bulk. There's even a rumour that you will be able to buy a premium version of GT, probably for 30-50% more money, that gives the buyer a pass to all future DLC.
So, bottom line... wait for the details, and decide on your own when to open the wallet. I bet they'll get you too.
That's the beauty of it. You don't ever have to, if you don't want to. 1000 cars should keep you plenty busy.
We just don't know if or how they will deal with DLC. Like new model years, there are good reasons for it. Also, there are other companies out there to cite as better examples of how to implement micro transactions. EA is pretty greedy that way. I doubt PD will follow their model. Even EA offers bundles though.
DLCs are great... when used the right way.
I believe that what OP means, is that many "smart" developers release incomplete games, then sell DLCs to get more money. It's happening with nearly every game that have DLCs nowadays. It's literally a rip off.
Take Soul Calibur for example. I paid 60$ in the game, and they want to sell me a single character (a very annoying one when fighting against) for 5$. Why? It could easily be in the game already (which in fact it is but I need to unlock it by paying, not by beating the game as you would expect).
One example is not enough? What about Resident Evil 5 and it's failed multiplayer mode. Another one? Fallout 3 and the extra quests. And I could keep going and going but you got the idea, I believe.
I certainly hope that's not the case with GT5. Used the right way, DLCs can make an epic game even more epic (if that's possible) and it really doesn't look like they will be misused, but who knows...
I'm sure PD doesn't want to release an incomplete game, but knowing them, and previous versions there will be things that have been cut (like drag racing.) I'm sure they wouldn't like to release the incomplete game, but they KNOW, and with a huge fan base, if they have DLC that costs money, it will be bought.
I know that PD probably doesn't think that way towards their customers, but with the money I don't have to spend on PSN since it's free, I will definitely be glad to buy the DLC