Kenneth,
You are right about members spamming forums.
I personally do not have a forum, but as I go into other members forums to read the content, I have noticed that many members have posted their advertisement without adding anything to the subject.
This tells me that that member lacks imagination, which tells me that they are desperate and will not invest any money in their business, or they are not making enough money to invest in proper advertising.
We also have the members that send several emails a day inviting you to their newest and latest advertising source that will drive millions to your web site.
The next day, or even that same day they send you another of the latest and greatest sources to obtain traffic.
There is a reality here, there is a difference between traffic, and customers that have a genuine interest in what you have to offer.
Now, if the members happen to be in the Seller, Selling the Seller Business, they may be able to pick up a few customers that are new and inexperienced in marketing. Then when they discover that a certain program is not productive, they will leave it and search for another of the latest and greatest programs.
They then become like Junk Food Junkies and continue to search for any means of Free Advertisement.
Yes, there may be a few good sites that will produce some results, but the vast majority of these are no more than a means to take blood out of a turnip, and most marketer are poring their money (upgrading cost) down a rat hole.
Now I know that this seems to be some negative thoughts, but the positive is the fact they can save money if they let the expert marketers that harvest leads do the work and then purchase the leads from them.