They're implementing a "pay to post" system with pages for businesses, not-for-profits, celebrities, etc. This is explained by Always Upward blog:
For Fans: How to keep receiving posts from FB pages you’ve “Liked”
1. Find a page you’ve “liked.”
2. Hover you mouse over the “Liked” button. Which may or may not work.
3. Try clicking the “Liked” button. That also may or may not work.
4. After clicking “Liked,” try hovering over it again. This may or may not work.
(Sensing a theme? Access isn’t consistent…nor intended to be easy, I have a feeling. Please keep trying.)
5. Once you (finally) get a drop down menu, confirm “Show in News Feed” is selected.
In theory, this should put