Except Spotify is one of the only hopes against Audible. Audible gives terrible deals to authors, if you sell your audiobook exclusively through audible they take a 60% cut of the sale, and if you sell through multiple audiobook stores they take 75%.

And that's just the official numbers, according to this source they actually pay out even less than that. The average author's cut for an exclusive title is only 21%, and for a non-audible exclusive is only 13%.

Large established authors get significantly better deals, but all the smaller authors desperately need audiobook rivals like spotify to be a viable alternative to Audible's monopoly death grip on the industry. So it's not as simple as "boycott spotify", spotify or someone else badly needs to succeed in getting a meaningful slice of the market.