I really appreciate when you upload to other galleries in parallel with FA. No one site can do all the work, and a single gallery can go up in smoke for a handful of reasons.
Social media sites are not easy to navigate and they also tend to incorrectly moderate our submissions, if not deleting them outright. I would advise against turning to them as a secondary site, never mind a primary one.

If you're uploading to other gallery sites like Weasyl or Itaku in addition to FA, thanks. It helps to keep things easy to find, and I can be browsing your cool work on my preferred platforms.