Do a search on "'Like' Farming".
You can start a page called "Yummy recipes" and post delectable, cholesterol-laden, diabetic-coma-inducing recipes every day and add, "Be sure to post this on your timeline..." I have friends who comply with great regularity. They do not appreciate it when I look up the nutritional info and post it. (Reese's peanut butter pie: one-sixth of one has 1,441 calories and 87 grams of fat.
When your page gets hugely popular, FB takes notice and you can reap revenue from banner ads. That's when it becomes marketable to others, who can buy it and completely change the content if they want.
I sigh every time I see silly contests, "Please repost this if you love your grandchildren", "Here's a smile for you this morning"., ad nauseum.