A long-running game campaign is effectively a "serial". In recent years the connection to the format and pacing of television (serial-series) has become even more pronounced in many games (I often think in those terms myself when GMing), but as a literary artform we can trace the modern serial - with its deliberately crafted cliffhangers and non-terminating plotform - back to the penny books and ragpapers of the Victorian Era. It's an effective medium for a fast-paced society (or people with ADD). Back to games: When you write your APs - provided you write them relatively well - it seems pretty clear that you are in effect creating a collaboratively-sourced work of serial fiction.
So this: http://writerunboxed.com/2014/02/24/serial-fiction/
made me think "What if we did that purposefully, maybe even with an eye toward selling subscriptions to our campaigns? Could it work?"
Your thoughts? Are there any examples of this yet?