Originally Posted by Artashes
They aren't joining it because the forum is a "do-follow" site.
I never said that, but I get your point and agree with it. I'll stand by what I originally said though. I'll leave it enabled. I had experience of that when running forums many years ago and it didn't make much difference whether it was allowed or not.
I mainly take part in sites that are good/busy. Not so much about whether dofollow is allowed or not.