I have never run community sites for money, however, I wonder if making good money on a forum is possible. Well... I am sure it is "possible." I am more or less asking if that is something that happens relatively often to alexa 125,000+ ranked forums.
Please do vote and feel free to share your forum/story.
I run a non-forum community site that is would be around option 4 if I took any money from my site.