"Yea, great. Schematics for something now old, obsolete, and likely some parts are no longer available anyway. It'd be better IMHO to start a new design from scratch than try to revive this antique today."
I don't know, all I see is that the Deneb sold well and that even more ancient ppc cards sell for insane amounts of money on eBay. I'm sure the design could be used for something, IF it was really close to completion.
Maybe the explanation is that releasing it would have harmed Pegasus sales, after all, that's what they did after...