From the article: You have already received rich rewards for the initial publication of these documents, and releasing this data back into the public domain wo

From the article: You have already received rich rewards for the initial publication of these documents, and releasing this data back into the public domain would significantly grow your market and thus be an investment in your future. This seems really unlikely. It looks to me like Westlaw makes money by restricting access to information; I don't think they'd make more money if they had open access, though it would of course be very nice of them.