If it goes well, the bitches are discovered early enough, come into an institution where one cares for mother and the puppies and even the castration is paid.
If it runs badly one finds the babies dead and "disposed" in the garbage.

Even a small puppy that has seen the light of day in a shelter deserves a good future in a loving family, just like a puppy from a breeder, even if it is not a pedigree dog.