Mastodon is small and “decentralized,” compared to Twitter, though it’s a lot larger than it was before Elon corrupted his acquisition. But in my experience it’s much more civil than Twitter. The decentralized structure means there are more platform administrators monitoring the level of discourse.
I’ve started using Instagram more, since deleting my Twitter account. I notice that there’s a growing philosophy community there too. Perhaps that would be a good venue for WJS. Our site-specific discussion board is a good thing, but its reach could possibly be extended with a judicious social media presence.