I find this really interesting, there are so many new 'media' companies that have popped up who have been able to grow because of the effectiveness of the "You won't believe what happened next" style headline, much like modern SEO has moved away from grey hat tactics and now seems to focus on "aligning content with Google's values" I hope that content producers start being rewarded for building great content that's good for users instead of writing click bait headlines.
The really fascinating bit is how transient that kind of growth has seemed to be. All it takes is FB tweaking their algorithms to close the hole you discovered and suddenly your growth story is over. So the key is to use the window of time you have to exploit the news feed to transform your company into something that doesn't need to do shabby things like exploiting the news feed to stay alive. If you just keep riding the same pony, FB will eventually shoot it dead under you.
BuzzFeed is the one example I can think of of a company managing to use that transient effect as a sort of "booster stage" into becoming more of a general media organization, but there are plenty of others who failed to pull that transition off (Upworthy, ViralNova).