Spotify reportedly paid $100m in 2020 for rights to The Joe Rogan Experience, the streaming service's top podcast. The show is said to be downloaded around 200 million times a month.
Joe Rogan hosts a variety of guests who discuss their views on a range of issues - but some episodes have featured false and misleading claims.
Big names from the music industry, including Neil Young and Joni Mitchell, have asked Spotify to remove their music from the platform. They have criticised the music streaming service for publishing a podcast that spreads Covid misinformation.
Mark Coles traces the life and career of the controversial former martial arts fighter and comedian.
Researcher: Drew Miller Hyndman Producer: Ben Crighton Editor: Damon Rose