I still hold on the saying that nothing is permanent. Though facebook has always been popular among social media platforms, it also have some backslashes. So to maintain and improve their reputation, they need to adapt in trends such that they can still be relevant today.
How would they avail to maintain it if the trends itself is changing over and over again?
Well, this era seems to also repeat some trends all over again so it is sometimes it is easy to adapt to what the society wants to see in their newsfeed. But sometimes, not all trends have significant impact on their ratings so they need to try out new things every now and then. It is like
gambling where they try to create their own trends. And as far as I can see, they can last for longer time because almost everyone in the young generation has an account for it.