With Spotify on pace to cross $1B in ad sales this year, a look at its growing ambitions in advertising and its plans to become the YouTube of podcasting (Lucas Shaw/Bloomberg)

Lucas Shaw / Bloomberg:
With Spotify on pace to cross $1B in ad sales this year, a look at its growing ambitions in advertising and its plans to become the YouTube of podcasting  —  Millions of people watch videos of Joe Rogan's podcast.  They used to do that on YouTube, where Rogan posted full episodes.