SpyderNoir_JHA;
Is this just one of those irrelevent topics to increase your post count to 4 ?

, or are you simply noting a curious feature, which you have recently noticed common to product marketing ?
In my opinion, I assume for several reasons, that it is simply a result of marketing.........
The "SpyderEdge", is a trademark of Spyderco, and as such, when giving a title to a product, you generally choose titles which visually look good, sound good, and are interesting in order to appeal to consumer's.
Take SureFire for example.
In my opinion, it's much easier to name your brand using one word, and if it were 2 separate words, Sure Fire, IMO, it does not look as good, nor is it as visually eye-catching, and it also takes longer to pronounce, in that by separating the words, it becomes a 2 separate syllable brand name.
So they could have used; Surefire. However this changes the way in which consumer's view the brand, and also by using a capital letter to enhance the second word of the name, it gives more importance to the second part of the name, and thus makes it just as important, as visually eye-catching as the start of the name. So between "SureFire", and "Surefire",.... which is going to catch more consumer interest, and what is going to look better when being marketed, and advertised on billboards, magazines and so forth ??. It becomes a decision to the marketer or advertiser, or company on how they wish to present themselves or a particular product.
Same as Spyderco's "SpyderEdge". It is Spyderco's title to represent their serration pattern on blades, and so as a marketing tool, it separates the 2 words, but also blends them into 1 brandname. If it were "Spyderedge", it may not look as good, or it may not portray a particular message, or highlight exactly what is desired by the company. Same as if it were "Spyder Edge"....... it generally can often be a much better marketing brandname, if it were combined. Also when abbreviations are used in product descriptions, SE is the abbreviation for "SpyderEdge", and so by using a capital, it highlights the "Edge", so at the same time distinguishing it from the "Spyder" part, yet also combining it into one trademark brandname.
Just as you use "SpyderNoir", I assume you wanted to highlight the "Noir", to make it just as noticable to the forum, as the "Spyder" part, and as such you wanted to create 2 words to be just as meaningful as the other, but blended into one to make it more unique, more original, interesting, or what have you, it just gives the name more "umpf" than say for example; "Spydernoir", or "Spyder Noir", "Umpf" being through a visual means, grammer or pronounciation means, or simply just to have something different, all in all, it's the same notion as advertising, and marketing of brandnames and products, in that the idea of marketing a product, is to spark interest, acquire consumer attention, and basically make your product stand out from the competitor's products, and the rest of the market.
These are just some quick points, of which I personally see as using a particular means, in this situation, capital letters to highlight 2 separate words which have been blended into 1 to form a recognisable trademark of a particular brand/company, to advertise, and therefore successfully market a company's brand, or product.