Facebook does not limit your News Feed to show posts from only 26 of your friends.
While the idea that Facebook would limit its Feed like that sounds odd in the first place, it is a meme that's been making the rounds for over a year, and now Facebook has officially said it isn't true.
If you've never seen the meme, here's an example that I've easily found using Facebook's search (with the user's name cropped out). It claims that Facebook has a new algorithm which only shows posts from the "same few people," and that the way to fix it is to leave a comment or a sticker under the post, in order to make the poster appear in the commenters' Feeds. Read more...More about Facebook, Social Network, News Feed, 26 People, and Tech