Earlier quoted context omitted.
I just explained how it's morally reprehensible. The argument is right there, above the quote you chose to quote. Neat trick, but I'm sorry, a retort that does not make.
You didn't explain anything about why it is so, you just said it is, hence why I said it's your opinion. If you can't explain why, in more concrete terms, then there is no reason to believe your argument.
Consumers are limited by humanity. We are all just meat sacks at the end of the day. We cannot, and will not, sift through 1 billion books to find the one singular one written by a person. We will die before then. But, even on a smaller scale - we have other problems. We have to work, we have family. Consumers cannot dedicate perfect intelligence to every single decision. This, by the way, is why free market analogies fall apart in practice, and why consumers buy what is essentially rat poison and ingest it when healthier, cheaper options are available. We are flawed by our blood.
We can run a business banking on the stupidity of consumers, sure. We can use deceit, yes. To me, this is morally reprehensible. You may disagree, but I expect an argument as to why.