I find myself repeating variations on this all the time:
Much of your target market may be on Facebook, but ALL OF IT IS ON THE WEB & YOU HAVE A WEBSITE. Facebook for links; website for content.
Exploit the strengths of these social media platforms — use them for sharing — but don’t let them exploit you. Host your data on a platform you own and control. Use social media to direct people to your own website.
Posting a series of tweets that are simply links to Facebook — especially without any additional content or context — isn’t helping anyone. I see people doing this all the time. Why even bother?