News flash: people don’t give away good dogs. Shelter dogs are rejects and if you “rescue” one you are a top shelf chump. Especially if you paid some sort of adoption “fee”.
These places BUY dogs from puppy mills (check out Washington Post expose) in addition to getting the standard pits and chihuahuas from the more diverse income groups.
I literally laugh in the face of people who tell me shelter dogs are better than my carefully bred pure breeds.