Less and less people are using Facebook because better alternatives already exist. If Facebook doesn't change their tactics, soon people stop using it because none of the interesting people are active anymore. I see a lot of accounts of for example celebrities where all the posts are actually written in Instagram or using apps that aggregate external blog posts. A good test is to comment on someone's Facebook profile or page and count how many hours or days it takes to get a response other than a mere like. Some people just batch like all comments on their Facebook, Instagram and Twitter posts to make followers and friends think they are really active. What matters to other people is the quality of the actual replies to the comments or that "friends" actually comment back something meaningful in your own posts.