Yesterday Facebook announced a change to the News Feed algorithm that will treat Pages even more like people. Similar to the way friends tagged in posts and pictures show up in News Feeds of folks they might not be friends with, people will start to see posts tagged with pages they Like show up from pages they don’t.
Consider this example that Facebook has shared, of how the new system works:
See its help page here: Facebook Help. And for more about the change, see the official release from Facebook.