https://twitter.com/redtheminer/status/1025664792860618752
"It's reported that bitmain's risk wafer on 16nm/12nm/10nm all failed and lost around 4 billion yuan.#btc"

Heard about one such failure a few months back. 2 might be called unlucky (for them). 3 though?
Conspiracy? AXA bribed TSMC? Or just a very difficult business to be in?