By that time, he had sold almost all of MSFT. He was a ~2% owner. That sale was a lot more similar in scale to a hedge fund selling a large block of shares than to Jeff Bezos liquidating his holdings.
B) even if he did it would be kind of like saying that your 500k house isnt really worth 500k because if you walked out on to the street and and asked passers by for offers for a maximum of one hour you would almost certainly not get 500k.
