There was talk recently about how "a lot of Macedonian teenagers" were creating clickbait fake news sites to make a dime on Facebook. They figured out the formula that excited a certain cohort into lots of shares & clicks and they used it to make ad money.
Here's the thing: anyone who uses this site knows that algorithmic ranking systems are gameable. There are some protections against individuals or small groups repeatedly gaming the system, but Facebook has put a profit motive behind it. That, and stopping all of /pol/, or the 280,000 members from /r/The_Donald is not so easy.