Facebook (s fb) is in a never-ending quest to derive more value from its News Feed product, and just as it has tweaked its algorithms to refine news posts and communications from brands, it is now exploring how to make personal sharing from third-party apps more valuable to users. In a blog post Wednesday, releas, the company announced that it will be curbing the visibility of “implicitly” shared posts — automatic posts from apps like RunKeeper or Spotify — in favor of “explicitly” shared posts. Users were increasingly marking automatic posts as spam, according to Facebook.
“Over the past year, the number of implicitly shared stories in News Feed has naturally declined,” Facebook’s Peter Yang wrote in a related blog post for developers. “This decline is correlated with how often people mark app posts as spam, which dropped by 75 percent over the same period.”

While Facebook…