How is this different from email spam? People will stop trusting random sources for books. Established publishers will make sure that only vetted authors are able to access the market. The only problem is that it's difficult for new publishers and fringe authors to enter the market.
Because you didn’t pay money to receive the email spam. I suppose the main detail is that many people will just eat the loss on a scam book and devalue their trust in Amazon rather than bothering to refund and return it.
