Maybe more people will come back once Facebook implodes. After all, it's not as if people who used to post on text boards just stopped using the internet. Instead, they just gave up old stuff for newer social media. But Facebook is not exactly popular right now, and there doesn't seem to be a good replacement for it just yet. So maybe some old posters will return, even if only briefly.
That is, if Facebook implodes. The kind of people who frequently use Facebook are a lot of the time dumb as shit and probably Facebook loyalists.
I used Facebook a long time ago, and people mostly posted photos and life events. It seemed more genuine and meaningful. Sure, some people would pretend to be more successful and happy than they really were, but people mostly posted their own content -- photos and text.
>you know what my timeline is filled with? Memes and political garbage. People just "share" links and shit rather than posting their own content. Clickbait garbage, or screenshots of "funny" posts from Instagram/Twitter/Reddit/etc.
posting original content is hard. reposting shit is easy, simple as that.