Joe Rogan's blockbuster deal with Spotify is the streaming giant's biggest signal that it wants to dominate podcasting. Here's what it means for other show personalities and advertisers.

· Spotify has acquired Joe Rogan's popular podcast and will exclusively host his content and sell ads.
· Podcasting execs and ad agencies see the deal as Spotify's biggest bet on podcasting and say it could set a precedent for how other platforms court big stars.
· Some worried that the move signals the end of independent...