From my dealing with other open source software it is fairly common to have a Creative Commons license, and a separate non-CC license if you want to use the work in ways that wouldn't be allowable under the CC.
One of the big hooplas about CC 3.0 is how strongly it leans towards copy-left (the use of only as you picked out), cutting off the dual licensing that used to be common under CC v2
IANAL, but my understanding of the situation is that once they put it under CC 3.0 they gave up the ability to make any commercial licensing deals.
If it can be proven that they commercially licensed the content somehow, then it would take an actual lawyer to determine if they lost the ability to distribute the work at all.
-Terry
-----
"so listen up boy, or pornography starring your mother will be the second worst thing to happen to you today"
TF2: Spy
One of the big hooplas about CC 3.0 is how strongly it leans towards copy-left (the use of only as you picked out), cutting off the dual licensing that used to be common under CC v2
IANAL, but my understanding of the situation is that once they put it under CC 3.0 they gave up the ability to make any commercial licensing deals.
If it can be proven that they commercially licensed the content somehow, then it would take an actual lawyer to determine if they lost the ability to distribute the work at all.
-Terry
-----
"so listen up boy, or pornography starring your mother will be the second worst thing to happen to you today"
TF2: Spy