Yes, I see several spam messages (just like we see here constantly when clicking on the 'new' tab), but also many directly relating to 9/11 investigations. It looks like the forum was created by memeber Phil Jayan, who, in his inital stickied post Forum Questions, Issues, Bugs and Suggestions states that he doesn't have a lot of time for that first post, which leads me to believe he's a pretty busy guy and just threw that forum up to continue it after the old forum lost it's hosting (or whatever the case was). According to his profile, he was last seen on Nov 21, 2022, so he obviously doesn't keep tabs on the site every day and clearly needs some help with moderation.

Maybe you could create an account over there, drop Phil a line and offer to help with spam reduction/moderation, if you have time. Seems like decent forum software, I don't see any trackers listed in uBlock Origin, so the site looks safer than this site as a matter of fact, which is behind Cloudflare that does indeeed track users. Why Saidit is Cloudflared is beyond me, because doing so shows a lack of respect for users imo. There are other methods of DDOS protection that do not involve compromising user's privacy.

EDIT: Also, remember that 9/11 happened over 20 years ago, and isn't the hot topic is was back when the site was originally created. Users are elsewhere now, on other platforms that get more traffic where their posts generate more views and discussion.