Monopolies were dominant in the 20th century, but they are no longer as dominant. It’s easier for people to start their own businesses and rise to the top. There are more options which is great for the customer. For the seller, there is now less room for error.
In order to become a successful seller, you need to be honest with your clients. People know (or figure out) when someone is being dishonest to them. Dishonest sellers don’t get second chances in a world where there is a seller that sells similar or identical products.
If you want to stay ahead of the competition, you need to be honest to your clients every step of the way even when the honest choice is to tell your client that another seller offers a better product for their needs.