Thanks for the welcome, all. This forum doesn't seem to do notifications, although I see I can have replies e-mailed to me so perhaps I'll try that...

I hadn't considered the Sketchup warehouse as a potential laundering facility for pirated models, but I can appreciate that possibility now. That's a depressing thought. :(

Although talk of WERTS is drifting off topic, the early uploads did indeed contain complete OBJ meshes from DAZ (and other) models, or parts thereof. However the later celebrity morphs were in the form of "vertex-only" OBJ files, contining no facet information, following a kindly word from DAZ. I don't know the reason for this member's disappearance, but in my opinion it wasn't copyright infringement.