and finding a place for them in gaming. [...] One of my fundamental arguments is that by pursuing the Open Gaming concept, Wizards can establish a clear policy on what it will, and will not allow people to do with its copyrighted materials. Just that alone should spur a huge surge in independent content creation that will feed into the D&D network.Academics Benoît Demil and Xavier Lecocq, in the economic journal Revue d'économie industrielle, highlighted that a business goal of the OGL was to have competitors institutionalize a standardized rule system – "if WOTC could get more people in the industry to use the same system, players would learn only one system and be able to migrate from product to product and game to game without learning and transaction costs. While it would reduce the number of original gaming systems in the market, the idea was to increase the audience for everybody, especially for the leader. The ultimate goal was to establish 'd20' as a recognizable trademark, like 'VHS' or 'DVD'". In 2004, Wizards of the Coast addressed what would occur if the license was changed – the OGL "already defines what will happen to content that has been previously distributed using an earlier version, in Section 9. As a result, even if Wizards made a change you disagreed with, you could continue to use an earlier, acceptable version at your option. In other words, there's no reason for Wizards to ever make a change that the community of people using the Open Gaming License would object to, because the community would just ignore the change anyway". 4th Edition In June 2008, Wizards of the Coast transitioned to a new, more restrictive royalty-free license called the Game System License (GSL), which is available for third-party developers to publish products compatible with Dungeons & Dragons 4th edition. The GSL is incompatible with the previous OGL. However, by its own terms the OGL is perpetual, and remained in widespread use. Greg Tito, for The Escapist in 2011, commented that the GSL "released in conjunction with 4th edition took away many of the freedoms that the industry had come to expect with the D&D rules, such as reprinting text for clarity in new products". Andy Collins, a Dungeons & Dragons designer who became the "Design & Development Manager around the release of 4th edition", stated that:I remember arguing pretty hard to retain something