I disagree with this article in the strongest terms.The author seems to assume that ownership of an idea is some type of God-given right like life or liberty. I just can't buy that.
I suggest we take a step back and look at reasons copyright law exists. My understanding is that copyright law exists to encourage the creation of new content by giving creators a way to profit from their work. Therefore copyright laws should be measured by how well they promote the creation of new content. In this case and the case of most non-profit mods, allowing companies to restrict the new content built upon their IP does not improve the incentive for creation of new content. It does, however prevent the community from adding their ideas and new content to humanity's library of art.
I suggest we take a step back and look at reasons copyright law exists. My understanding is that copyright law exists to encourage the creation of new content by giving creators a way to profit from their work. Therefore copyright laws should be measured by how well they promote the creation of new content. In this case and the case of most non-profit mods, allowing companies to restrict the new content built upon their IP does not improve the incentive for creation of new content. It does, however prevent the community from adding their ideas and new content to humanity's library of art.