see aboveNot who makes the money. Who makes the breed.
Good breeders actually don't make much money due to the amount of money they put into the puppies and the cost of showing or competing the dogs. There are exceptions, but they are rare and very elite dogs. The focus of good breeders is the Breed Standard. Their goal is to create the most perfect example of that standard they possibly can. This may be changing. The recent increase in cost of pure bred dogs is kind of over the top.
Puppy Mills pump out the highest number of puppies they can and still claim they are "Pure Bred" dogs. They are responsible for seriously screwing up a variety of breeds that became popular.
Backyard breeders are either folks that try to be show or sporting dog breeders, but have no idea what they are doing and don't last long. Or more likely they are folks that simply have a couple of dogs they like and want to make more.
There are also breeders that go their own road without a care about the rest of the dog world.