I was thinking a little about RPGs and the music industry. Before today, record companies, radio, music magazines (Rolling Stone) and record stores were the primary media by which you learned about new music. Today, none of those are much of a factor anymore. You hear about a band by word of mouth, in a commercial, "similar music" on college radio (if you are so lucky to have one in your area), Amazon or Spotify or Pandora or iTunes and by artist touring. Getting into a festival (specifically large festivals that feature new music) are ways new artists can control where people can "bump into" new music. It's really hard for a new band to break onto the scene these days. Music COULD be opened up if were less corporate and more managed by independent jockeys again.
For RPGs, we have YouTube, Kickstarter, Roll20, (podcasts?) as our electronic media and small but benevolent hobby stores that might feature alternate titles. But the best way to get a game into view is probably at conventions, and having enough referees and tables to introduce new games. It'd be interesting to see some conventions spring up that feature non-D&D games (or at least a smaller percentage of D&D games) and market itself as "genre-expanding roleplaying" similar to a college radio station.