How To Sell Your Ebooks Directly And Earn More Income – by Derek Haines…
When you sell your ebooks with KDP, Amazon takes at least 30% of your selling price. In some cases, it can take 65%. On top of that, you might even lose more due to downloading fees.
If you sell your ebooks with Smashwords or Draft2Digital, both take around 10% of net sales. It means that if you sell an ebook on Apple or Barnes Noble, each takes 30% of a sale, and then your aggregator takes 10% more.