Today I have published a post on my Facebook page. It was my two book recommendations of the books I've read in 2017. The covers were added as images to a post, and there were four paragraphs of text, first one explaining what I'm doing, second and third one a really short reviews of the books, and the fourth one asking my followers to recommend books in the comments. Knowing that it won't reach anyone, I have also purchased an ad (3 euros, one day), targeting fans of the page and their friends.

Organically, it reached 149 people (smaller posts reach 3-5x as much on average). It reached 1,471 by a paid promotion. Number of people who liked, commented, or even clicked to see all four paragraphs is 45.

My point is: you're a minority. And people who post like that get punished greatly by their algorithm. My ad was even postponed for like 30 minutes because images contained "too much text for an ad" until I clicked on "manual review" because I saw in their help pages that they let book covers slide.

If you run FBP -- and I can't use Facebook without it now -- there's an option to remove the backgrounds and simply render them as text posts.