On the KDP dashboard, you can choose between 35% and 70% royalties for books within certain price ranges. I chose 35% because you can opt out of Kindle Lending, and there’s no delivery fee on purchases. The little check box is checked and grayed out automatically when you opt in for 70% royalties.
I had hoped eliminating the lending option would convert interested parties into sales, and felt the other 35% was a reasonable sacrifice to be able to make a choice on the matter.
In the end, it didn’t matter at all. There’s a certain irony here.