The month before the GSL was released, WOTC presented a FAQ that actually asserted that was going to be the case ("you cannot publish anything again that uses the OGL"). You had a situation where at least one WOTC spokesperson responded to a direct question about it and said "yes" (along with some snide "why would you expect otherwise" commentary).
Then they went back and said they were revising it and it was toned down a bit. I followed that pretty closely.
If you can link the quote to which you're referring, I'd like to see it. My understanding was that the business of company-wide restrictions was a misunderstanding that was later clarified, not an actual part of the license that was later revised.