And those promotions should be a cost of Amazon, not the authors. Weird how Amazon can take your product, sell it for a quarter of the price, and then claim they now owe you no money.
Audible's whole business model is to sell monthly credits on subscription for $15, which can be used to purchase any audiobook. That's not a "promotion", that's how Audible works.
Now they do also have sales where they sell books for like $5 or something; if those sales are not opt-in, of course that's a problem. But I have a hard time believing they're not opt-in.
