Tesla and SpaceX CEO Elon Musk has expressed his appreciation for the growth of Spotify Inc. (NYSE:SPOT) in the audiobook industry. What Happened: On Tuesday, Spotify CEO Daniel Ek took to X, formerly Twitter, and provided an update on the platform’s audiobook feature, which was introduced a year ago for premium users. Ek said that Spotify has paid out hundreds of millions to publishers and has doubled its catalog. “Our catalog has doubled to 300,000 titles. We know that our listeners are loving bestsellers, but they are also very excited to be discovering backlist titles too,” he stated. See …