That's kind of BS. If a breeder sells a snake to a person, he's looking for a repeat customer just as much as a store. In fact, stores often count on the customer coming back for food and other items so they want happier customers while a breeder who only sells the live animals may never see that person again, since they already have the pet and not every person wants multiple snakes.

You're counting on each customer being a breeder and wanting multiple animals. That's not always the case. And there's plenty of breeders who figure there's plenty of fish out there for them to sell to, so a unhappy customer means nothing. Same as stores that don't care if the animal dies, a breeder could think exactly the same way.