I've noticed the same thing. I just assumed that a lot of newer people have moved on to social media. I don't have any social media whatsoever so this is my only reptile platform I'm a part of. It's also close to the holidays so maybe people taking a little break.
Reddit, to me is a jumbled mess of misinformation and I try to avoid it. Besides that I also don't use social media. In the past it seemed site traffic actually increased around holidays. This is not normal.