The new model does distribute royalties according to titles or hours listened, dividing the value of a member’s plan and any additional audiobook credits used “among the titles the member listened to over the course of the month.” Audible’s new royalty model is a response to Spotify’s encroachment into the audiobook space but it is also an early statement to the publishing world about how the company plans to account to publishers and authors.
Source: What Audible’s new royalty model means for its audiobook battle with Spotify