Egohotz is brilliant in many ways, but taking him at his word when it comes to working with others has been a mistake since at least around 2010. This is well documented.
Who said anything about taking him at his word? Everything he has done regarding AMD GPUs has been in public. I'm sure there are plenty of valid criticisms one can make of his skills/strategy/attitude/approach, but accusing him of being generally untrustworthy in this endeavour is utterly nonsensical.