Magazines, much like television networks, usually start out pandering to one or a few interests: video games, movies, human-interest stories, the list goes on. Publishers like the brisk sales, and people in the demographic groups like the fact that they're getting a magazine for their interests.
But then along comes Magazine Decay.
Some exec at your magazine realizes that he could attract more people in your demographic by, say, adding some dirty humor to your video game magazine. Or adding celebrity gossip to your housekeeping magazine. After all, housewives like housekeeping, housewives like George Clooney, so why not combine them?
Much like Network Decay, the magazines will usually succeed regardless, but there will always be that contingent that misses the good ol' days.
