I don't think he will just pay the board $0, effectively what he means is he will fire them!

After accepting to be part of the board and then rejecting seems to suggest that they are unable to work together or have different thoughts on how to take the company forward. He might just fire them in the name of being able to implement the changes necessary 'to unlock the potential' of Twitter. 

The next question of what's next is tricky. Inrecent times, his behaviour is clearly one that invites controversy. In the name of free speech, his speech has not been consistent with his actions too. He has ranted much about the need for the ability to edit amongst other complaints. He also has slammed Twitter repeatedly about hindering free speech.

There are many suggestions by him on how he wants to change the platform in terms of functions and business models. He even proposed changing it to a shelter. This is a complete change or even destruction of the corebusiness.

What he will do with Twitter? Only time will tell. His speech is no indication of what he will do. Thus far, seems like he is a man who doesn't abide by his words, in other words, 'free speech'. He has been erratic and highly unpredictable....