I definitely plan on continuing to be active in this community, though I could contribute more than I do at the moment. I'm kind of "old school" and I prefer this type of discussion forum over social media.
One way to get more traffic here would be to divert more of the discussion back to the forum. Polls and contests could be announced on Facebook, but participants would need to navigate back to psybient.org to participate. If you're posting article or reviews, you could post a brief synopsis and include the tagline "read more..." or something which hyperlinks back to the forum.
It takes some work and time, but it's a way to "normalize" using the forum again. I think it's also important to look not only at posts, but views as well. In my experience, a lot of people are "lurkers" who read but rarely, if ever post. This goes all the way back to the beginning of web forums.