First, reputation management.
You have poured your heart and soul—all your experience—and hard-earned knowledge into a book where few, very few, people read it. Worse yet, anyone can look on Amazon to see your hard-earned work being offered for pennies on the dollar. This one act makes your story, and you, worth pennies.
Next, as the author, you have NO CONNECTION to your readers.
You have no idea if your grandmother, competitor or that perfect client bought your book. If this wasn’t bad enough, you are not privy to the purchase record of those buyers in order to sell them another book … or service … or consultation. The book retailer kept your sales data as their proprietary information. And you are the BIG LOSER.