I almost think its too late at this point, unless they have one hell of an arc. I don't see them being "open" until MS is totally out of the picture. I honestly don't even hate OpenAI in its current state... but sitting on the fence, trying to be both "open" and attached at the hip to MS is just... odd.
What can you promise any other investors when you’ve already agree to give MS 75% all of your net income pretty much indefinitely and 49% of your shares?