Having read the article, it looks as it's though David Moore who is suing GW, not Spikey Bits. They are just reporting what his rather lengthy complaint is.
I found myself losing empathy with Moore's argument the further I got into the article. His grasp of facts seems flawed in places, notably when he tries to argue that Europe works on a socialist economic model, which is factually incorrect, and that the US as a bastion of free trade should somehow be treated differently to the rest of the world. I dislike these kinds of arguments, as they are not only based on an incorrect assumption about how the rest of the world operates, but also highlight the problem of US exceptionalism.
Moore's complaints about IP theft are, in my opinion, misplaced. Orcs, Elves, Dwarfs, et al have been 'borrowed' from all sorts of sources by all sorts of authors and companies over the years, yet Moore makes it sound as though only GW has done this. He'll get precisely nowhere with this element of his complaint in my view.
His comments about pricing and the freedom of store owners to set their own pricing system and have their own internet ordering system is probably the only viable aspect of his case. I'll be interested to see how this develops.