I am surprised that so few people are offering User Tracks, which seems like a good way to go for "special requests". I would love to purchase a few User Tracks that would fit specific project(s). Yes, there is Fiverr, but problem with that is most of the people there do not know what BIAB is. So to get something done, you have to do it from scratch. Find person of specific genre, explain specifics of recording, get files, work them into User Tracks, etc, etc.

If for example a few musicians that know this stuff would offer exclusive or non-exclusive User tracks in that forum section, it could take interesting direction. I do not believe it would create internal competition with PG, because when on sale, PG release(s) are priced very, very fairly. I think quite opposite might happen. More content - wider audience.
Anyway, my 3 cents.