I'll answer since they didn't. Kindle Select is direct publishing only, so they don't have another publisher. They get paid based on number of their reads (tha

I'll answer since they didn't. Kindle Select is direct publishing only, so they don't have another publisher. They get paid based on number of their reads (that's anyone who reads >10% of their book) as a proportion of number of total reads across the library, calculated against a money pool that Amazon determines month over month and tunes to keep the program attractive. More details here: https://kdp.amazon.com/help?topicId=A3BQJE2QV37M1B#kll_calc https://kdp.amazon.com/help?topicId=A3BQJE2QV37M1B#kll_calc