Seems to me with many of these small and innovative companies there's a constant balancing act of managing their product(s) vs managing their customers vs managing their business. Each element effect the others, and the balance is constantly changing as external factors often unpredictable occur, while often having to learn many new skills as they go. So to expect the same sort of service as from large established profit engines is not really realistic.
They comprise a whole ecosystem of their own, and as pointed out provide us with products that would be unlikely to see the light of day otherwise, and in our turn, we give these companies a chance to thrive by investing in them by buying their gear. It's a game of give and take. Without accepting the fact we act almost like investors for the company and in return take certain risks (such as customer service sometimes suffering) and in return we get shit to play with that few others even know exists.
So when I see Vapvana bring out one of the best ball vapes currently at a price that few other equivalent products can match, if I get a bad o-ring, that's something I can source myself if need be and hardly expensive. It's not like having to spend $50 or $100 on a new part. To expect a tiny brand new company to be perfect on everything is not realistic or reasonable.
The exception I saw here was the failed Pid, that ought to have been a no-brainer to get replaced asap. But if an o-ring is going to create paroxysms of anger against the company, maybe this cutting edge stuff isn't the best place to be? Stick to a Mighty or whatever?