The cookies of the Amazon associate and audible program are the same which is 24 hours. It means that if some follow your affiliate link and if he didn't purchase at that time, but purchase within 24 hours, then in this case you will get a commission of the product which is purchased. But if someone adds that product to the cart (after following your link), then if he purchases it within 90 days, then in this case you will get a commission of the product which is purchased. NOTE: You will get a commission only if a user has not followed any other affiliate link (of Amazon), after following yours. If he follows another affiliate link, then he will earn a commission, not you. I Hope, this is clear to you.