This is misinterpretation of what happened. There was a warranty - called "No bullshit agreement". All Yifu had to do is to fulfill his side of the agreement after we've fulfilled our side and you were guaranteed to profit.

I really can't believe my eyes seeing people jumping into "replace non-delivered gen #1 with gen #2" business. At the end Yifu will present himself as a hero not delivering to us "worthless gen #1 chips". I can already see Avalon announcement:
"Just send some more BTC our way covering the price difference between gen #2 and gen #1, put Yifu's picture with "Hero" T-shirt as your desktop background and you are eligible for great gen #2 chip replacement!"