I'll spell it out for you a lot simpler since you seem unable or unwilling to understand.
1) First few orders only...assemble as fast as possible,
I get it that time to market is crucial, but if that is your only argument, testing a die or chip (that has been processed for about a month or more in the fab) takes about 5 seconds in a machine. How long do you think it takes to assemble a complete miner based on a faulty chip?
Seriously you guys are misinterpreting whats been said, or they misunderstood the question. There is no way anyone is going to assemble a complete pcb around a chip thats had neither wafer level nor chip level testing.