My position is that Tucker can go work for whomever else he wants, if he is willing to forego the bonuses that written in the contract for him to abide by the non-competitor clause.
It’s an arguement betweeen two parties. It is correct that Fox did not count for Twitter, so Tucker will argue that Twitter does not break the non-competitor clause. Fox may say that Twitter wasn’t a competitor at the time the contract was signed, but it is now so the spirit of contract should still be binding.
It will be interesting how the courts rule.
When heh first joined Fox, putting your program on Twitter wasn’t considered a realistic idea. Now it is.