I don't understand it, and it frankly irritates me to see great production knives announced with fanfare, only to be unattainable unless you're very lucky or willing to pay absurd prices. I can understand wanting to generate excitement about a new release by having a limited offering which impels people to get swept up in the excitement and just buy it, rather than to wait for the frenzy to die down. After all, there is a lot more demand for Military/PM2/Manix XL variants in s90v/CF than for the earlier regular production Stretch in those same materials, even though the Stretch is also generally well-regarded. But if you want to follow that limited release business model, why not do it in the same way as Busse and offer as many as the market will bear, but just for a limited time?
I find it more understandable in the case of Spyderco, where they typically just swap a blade steel and G10 color, but ZT limited editions, where they tool up to produce only a few hundred of an entirely new model seems strange. Did they really make much from their 0777 project? Perhaps it was just a loss leader to generate excitement in their line in general, and to help launch 0770 models, but I don't think that objective would have been hurt by releasing more of them either.
To be clear, I have limited Spyderco military, PM2 and native variants, and I have a 0777M390 and 0600, and I am grateful for them. But I only bought them because I was able to find them at reasonable prices, I have no intention of flipping them, and I would still have bought them if they'd have been available in larger numbers.