The FE Believers forum seems kind of active over there these days. Strange that they wouldn't allow you access back in the day. It seems more like a repository than an FE2FE debate section. Bishop has a good thread going on right now about (and I paraphrase) scriptural support for UA, but again, it seems more like a repository of ideas than a debate as no one else has engaged.
Maybe the problem is that there is about a handful of FEr's on either site. Personally, I'd love it if there were 50 FEr's to every REr here and there.
I will say, doing some metrics analysis for both sites, especially here, things have dropped off considerably. Maybe twitter has exploded so the forums don't matter as much, I wouldn't know, I don't follow TFES of twitter.
Recent analysis:
I did start diving into the numbers and came up with some entirely anecdotal, hardly scientific results. I picked 'New Posts' here and at TheFlatEarthSociety just to do a compare to see if I could target a trend. Again, super anecdotal, but what I found was interesting at least on a surface level.
Taking
New Posts numbers from June of 2018 and comparing them to June of 2019, I found a 15% drop-off at TheFlatEarthSociey.com. However, at TFES.org, I found a whopping 142% drop-off. Probably means nothing as I simply picked 'New Posts' as a metric and maybe it's the wrong one. But the numbers are interesting nonetheless.