From a pure capitalistic point of view I would say thy the market will deal with this correctly over time.. There is a big difference in my mind when a knock of is being sold with the originator having no retribution avenue and when there is a huge manufacturing operation being run and the big corporations have millions they can spend in taking the offender to court and putting a stop to this "stealing" if you want to call it that.
Like I mentioned since I'm not vested in the industry, ie I don't earn a living dealing with these big manufactures or am sponsored by them, then from a moral stand point do I really have an obligation to society to help in bringing this knock off down? This is what I question, and that is why making this issue a moral ground issue is not correct in my opinion.
I mean, it's a moral decision whether or not you want to characterize it that way. We're just talking about the morality of intellectual property protections as opposed to the morality of killing or stealing tangible things, which is what we typically consider when we label questions as "moral."
Why don't these companies sue and shut down gigagolf? I don't know enough about IP law to answer that. My gut reaction can't believe that Taylormade can't get after them for trade dress violations, but that's an uneducated reaction. Patentwise, I don't know what these companies have been able to patent or not because they might be failing the "non-obviousness" requirement. Sort of how Apple can't sue someone for making their phone smaller and thinner; it's an obvious direction of the field. But whether we (society / law / whatever) have provided the means to give the major manufacturers recourse against gigagolf is a side question. The real question is whether people think that what knockoff producers is acceptable, especially in light of what it can do for the golf club business long term. The sustainability of it, if you will. I don't work in golf, but I'd like to continue enjoying manufacturers having incentive to push technology forward and make the game more interesting. I think the only way to do that is by shunning knockoffs. You may disagree, and you're welcome to.