I had a great question come through about whether you should set the retail price for a book the same on Amazon KDP and IngramSpark. The two Print On Demand (POD) offerings allow for slightly different royalties for the author and IngramSpark has the option to increase the wholesale discount.
In this case, for me and my strategy, I set the retail price the same across all platforms. No matter what retailer my reader prefers, they know they’re getting the best price.
Where I do use price discrimination is in offering exclusive discount codes to people who subscribe to my newsletter (https://mailchi.mp/52c7cd246b5b/authoryourambition) or who are members of my channel (https://www.youtube.com/channel/UCjvBO4kjuBSYe6Bi3RYQAQA/join)
Best of luck!