I use my personal network or inmails (paid for by my employer) to contact people and my personal page is a landing page for developers.
I disabled the scrolling facebook like front page and I use buffer to post articles for me during the workday.
It's mostly helpful for getting job offers and generating interest in yourself. Even I get multiple recruitment messages a day so I can only imagine what developers inboxes look like. The problem for some people who haven't found it useful is most recruiters only target the young developers who look like they will be easy placements.