It might not seem like the case right now, but I think the real disruption is just about to begin. OpenAI does not have in its DNA to win, they're too short-sighted and reactive. Big techs will have incredible distribution power but a real disruptor must be brewing somewhere unnoticed, for now.
That they reached a different conclusion than the outcome you wished for does not indicate a lack of critical thinking skills. They have a different set of information than you do, and reached a different conclusion.
Sign the letter and support Sam so you have a place at Microsoft if OpenAI tanks and have a place at OpenAI if it continues under Sam, or don’t sign and potentially lose your role at OpenAI if Sam stays and lose a bunch of money if Sam leaves and OpenAI fails.
There’s no perks to not signing.
Or maybe the mass signing was less about following the money and more about doing what they felt would force the OpenAI board to cave and bring Sam back, so they could all continue to work towards the missing at OpenAI?