We don't think so. In fact, based on our experience, online sales replacing regular channel sales will be very small. But even if every single sale here replaced a regular channel sale of your printed inventory—which it won't!—you would still be coming out ahead. (If you run the numbers, including traditional channel discounts, cost of goods sold, etc., you'll see what we mean.)
Most importantly, though, listing with us will boost the discoverability and visibility of your title and get more people interested. After all, we have over 250,000 unique visitors to our marketplaces every month. We will net you more total purchases than you'd see from selling only through traditional distribution.