Given he is now the largest shareholder in Twitter it was assumed he would be asked to join the board. For the chief executive of Twitter, Parag Agrawal having Musk on the board must have represented the lesser of two evils. Having Musk inside the tent would have been less dangerous than having him outside lobbing grenades in. Staying on the outside, Musk can become the activist-shareholder equivalent of the 10-year-old boy pulling the wings off flies. If he has no plans to increase his stake (and few are brave enough to take a punt on his intentions), the world's richest man may have spent $4 billion just to indulge himself. If these intentions are not constructive for the social media company, and Musk becomes just an influential troll that soaks up Twitter management's attention, it's hard to see how this will be positive for the company. The bottom line is that no one other than Musk knows. It is the definition of a poorly informed market.