Somehow it appears awkward to have several locations for sceneries (official terragear and custom), which most likely will lead to different development paths. Apparently this applies to many custom scenery projects out there. I wonder if there is some common understanding on how scenery (especially buildings/objects) should evolve.
The FG project believes all scenery should best go to terrasync - because all else is awkward.
Anyone who believes differently for whatever reasons (no intention to adhere to guidelines, different license, pride in the own creation, not wanting to cause conflicts...) creates a piece of custom scenery. So it's the lack of common understanding which drives the creation of custom scenery.