The idea of a new forum, or even my comment about "fresh blood" is not dealer inspired, or anything of the like. It has to do with fresh commentary, fresh points of view, rather than the same 20 people always opining. Like anything, that could get stagnant and will not keep things perking along, to a great degree.
People come, people go. So... as some leave, it only makes sense that other collectors feel like they can come and play. It isn't about getting others interested in the hobby. It's about those that are already interested and collecting that should feel free to join, whether it be here or any other poster forum.
And many help others with tips, leads, links, the name(s) of a seller that may have something that someone is looking for... so in that sense, it is a bit of a "team sport" (the grape vine idea).
Sure, there are those that hunt and scour completely alone, but I'm sure even the most solitary of collectors have their sellers or "connections" that they have dealt with for years who will call or email, to let them know they may have something that collector may be interested in.