There's no value in SO's database of questions and answers, they might as well give it away under whatever liberal license they want.
The real business value of SO is the engaged ("community") web traffic it receives. ("Community" == "higher ad CPM" and "highly contextual advertising" in business terms.)
The real business value of SO is the engaged ("community") web traffic it receives. ("Community" == "higher ad CPM" and "highly contextual advertising" in business terms.)