Indeed; as with tie dye (albeit quite a bit less controllable), each shirt is unique and many retailers and other customers balk at this. Still a viable technique for some boutique customers, assuming you have them. Combined with a suitable waterbased print there are endless possibilities.
When I introduced a very different set of spray/watermark/discharge dye etc techniques to a few companies that I ran it was always the same. Can we reproduce efficiently? And later, "Although this is remarkable, it is not viable and even if it was, the price point is too high".
Fast forward to now when I can do whatever makes sense for me.
Its all about oil in water......