I've always found it interesting that the stores with the worst reputations always (and I mean always) sell the most cars. Why is that? And as long as that's the case, why would they ever change their ways?
In Edmonton, you'd be thinking about Derrick Dodge and places like that. I always wondered how they do it. They treat people like crap and sell a ton of cars. Huh? Well, they blow big bucks on multi-page newspaper ads, have tons of radio advertising, and it works. They get people through the door and your typical schlub wants to go home with a new truck. Showroom traffic equals sales, period. Also, many of those shitty tactics get people to be invested in the sale. Other tactics don't come until after people think the sale is done, like extended warranties and etching and other junk.
There is another thing at play here. Jerk customers buy a lot of cars. (My theory anyway, no supporting data, but my intuition tells me so) Whassat? Well, most of the people I know think very carefully about a new car purchase, even the car nuts. We'll research, visit dealers, browse for ages, and then push the button.
People that impulse buy something as expensive as a new car are more likely drawn in by the gimmicks and radio ads and free BBQ's and all that

. So, on a Saturday afternoon at Derrick (or place like it) we're not likely to find people like me. It's people that are upside down from trading in their truck long before making a dent in the loan, and have done this for the last five trucks. They need a dealer willing to do ANYTHING to get them into that new truck, and the radio ad said that THIS dealer would. And they do. Also, I know I'm not getting a free BBQ, it's just built into the price somewhere. I don't want "credit card cash" as I know it's just a bunch of extra financing built into my car payment.
What happens to the auto industry when all the people that shop at Derrick aren't down impulse buying a new truck? Can we rely on sensible and prudent shoppers? Nope. Look at the sales numbers for the last two years. With the tightening of credit and the loss of employment for many blue-collar workers, auto sales have plummeted.