The hardware in pool ARE in hands of customers.
Chips were split after production and each party decided to do own assembly - that's why different parts of chips had different success ratios. Unfortunately problems happened with 100TH mine assembly. But - more chips will be a bit later and it would be quickly restored! You should understand that it is really hard to produce equipment, and that causes delays, unpredictable.
Also after all of that experience - likely we won't do any preorders and work only with stuff we have in stock. Working with expectations, _especially_ where days count and production can go wrong any time is bad experience.