

This is from an email from author and biomechanist Katy Bowman, and I've verified the print and e-book numbers (https://thetechylife.com/how-much-money-does-amazon-take-from-book-sales/). Still looking for audiobook numbers as the linked article is less detailed on those. I also learned that Amazon controls 80% of book distribution in the US.
If you, like me, are alarmed by this, check out bookshop.org, libro.fm, and kobo.com for alternatives.
Incidentally, kobo e-readers can read regular epubs - kepubs work slightly better (and are easily converted to in calibre), and you can side-load any epub of pdf you want.
For GR: it's very easy to import your GR to StoryGraph or OpenLibrary! 2w