By far the greatest amount of posting went on in the non-subscription sections because, like here in the ETS forums, people were interested in helping out newer members and were interested in sharing their knowledge and experiences with those who may have been new to the subject.
What took place in the subscriber sections were more advanced exchanges of ideas where there was already something of a shared knowledge base. Topics tended to have longer lifespans in those sections (one was reaching the 5000 post mark when I finally dropped off the forums), and the tendancy was that there was less redundant posting.
Please understand that I don't mean any of this in some sort of elitist fashion... I only mean that people who realized the worth of the site and who were willing to subscribe probably had been around for a longer period of time and because of that tended to have a large base of knowledge to draw from. Obviously that was not always the case. From time to time someone new would come to the forums that had just as much if not more knowledge of the topics covered.
Anyway... I don't know if such a thing would work here... I'm just spitballing ideas... <img src="/images/graemlins/grin.gif" alt="" />
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"Learn survival skills when your life doesn't depend on it."