Frankly, back to the topic of the thread, there's nothing particularly wrong with the level of participation here. Forums, by and large, have lost a ton of traffic to social media and sites like Reddit over the last decade. I've been posting on disc golf forums since the DGR days, and I was one of the more prolific commentors there as the science of form analysis was being created. We saw just about as much traffic there, back then, as we do here, today.
If there was a heyday for this site, and for forums, they both have passed - and that's okay. This forum will be around as long as its new owners deem it profitable enough to keep sucking up hosting and bandwidth costs. Some day it will go away, as all things do. The same is true of the course review side - which, having seen how outdated the UX is on it, was always going to fall by the wayside without any modernization. Disc Golf Scene started as a more modern take on the concept, and UDisc evolved on it from there. There's nothing wrong with having been part of what laid the foundation for the things that the modern apps do - just don't get stuck on the idea that what you have here has to remain as relevant as it was, back when it was relevant. That's putting an awful lot of emotional investment on something that was ephemeral from the very start.
That said, BBS'es were cooler than the internet has ever been, and I miss those days deeply...