I think it is really something you have to decide for yourself. As you say, not everyone has the same opinion, but as long as it is a grey zone I don't see that a moral judgement can be made.
I would buy the Gargoyle and I happily buy an eye beast or Toothy Chest etc. I would not buy the Not-Marine, mainly because I don't like the SM design, but if I would GW offerings are better.
I mostly think we need less pitchforks and more miniatures
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