If publisher X uses the OGC of publisher Y and changes it a bit, that new, changed bit is not by default OGC. You seem to think, and repeatedly insist, that it is OGC...but it is not. That's never been how the OGL worked. Whatever content the publisher makes OGC is all that's OGC. If someone wants to stand on the shoulders of OGC and not release their stuff as OGC, that's entirely their choice. You and I agree that they should, but there's nothing in the OGL that requires them to. The CC-BY license is far more open than the OGL.