One of my favorite comedians is Myq Kaplan. He recently posted on Facebook asking his fans to comment on a memory of meeting him or hearing his material. He made the point of responding to each comment, including mine. And now I see his posts all throughout my feed.
So I can only conclude that the Facebook Algorithm™ will give a higher weight to posts from people/pages that you've had a conversation with. Which makes sense. And it also means this is a great way to get more exposure of your content in Facebook without spending money on ads.
Create a post that encourages people to post a comment about something, and then—this is key—respond to each and every one of those comments. Even if it's a simple "thanks!". It will take some time and effort, but I believe you will see an increase in exposure and engagement on subsequent posts.
Send me a note and share your experience if you do this. Thanks!