If BITOG remained exclusively a lubrication forum, it likely would not have much traffic. Once the traffic dies, the postings die. I can point you to dozens of really good forums with a really good subject, that are stagnate or died off. One was pontiacbonnevilleclub dot com. Awesome members, no advertising, outstanding moderation. But the Bonneville (and Pontiac) are gone and not enough new stuff to talk about for the forum members. Now that forum is a repository for researching Bonneville issues, but not active enough to get SMEs to visit the board regularly to respond to questions.
BITOG started as a lubrication forum, but IMHO it is a master mind group of people who like vehicles and often are people who can DIY stuff and think independently.