Say the board has a reason to believe that Twitter is going to double in value in the next two years. ie, they have a secret "Twitter Gold" product that they are certain will triple profits.

It would be a disservice to me, as an investor, if they sold the company at a value of $54/share knowing that it could easily be worth much more than that in the near future. As a shareholder, I hired this board specifically to make decisions with information that isn't public. I either trust them or I don't.