Just because she breeds mixes doesn't mean she's a bad breeder. I think that a BYB is someone who doesnt' care about genetics, health, or the future of the dogs, and only about money.

If she genetically tests her dogs, temprement tests them, trains them to perform in obedience or something, raises them in humane conditions, and has a contract (including that she'll guarantee health, take them back if you can't keep them, and that all pups must be fixed) then she has the same rights to breed her dogs as someone who does the same tests and training ect on purebred dogs.

Then again, I can't tell if she does all of that from her site. so she might be a BYB, but you can't judge just by the fact that she breeds dogs that aren't purebred.