Another benefit of having an open forum is that realistically, I will not be able to post any useful information on a German forum like that.
So there is no need to join, only to make a few posts, and then probably get bumped out of the membership due to lack of activity.
But if I could see what they were doing, then I could interactively comment on what I see, for example from this forum.
At least then we could all interact and discuss in some way.
Again, in my opinion, open forums (open forum means that you can see everything regardless of whether you are a member, and not to be confused with a forum who admits anyone for any reason, and regardless of whether they post anything or not such as HMEM) are the only way to go.
Note, there is nothing wrong with the way HMEM admits anyone as a member regardless, if you have someone who can spend a bunch of time each day weeding out hundreds of spam applications for membership. Most people who run forums just don't have time for such things, and have to have a "on request" membership. More power to HMEM if they do allow anyone. It does seem kind of odd to have 10,000 members, when only perhaps 500 have ever made their first post, and of those 500, only 100 ever make a second post.
I think the reality is that 1% of the 10,000 members make 99% of all the posts.
I think we have to realize we can't join and actively participate in 20 differnet forums (unless we are retired and don't have anything better to do, I am not retired).