Or Hatebook could decide that this law is unjust and block all users from Nebraska from accessing their platform as a protest. This would do more to get the law

Or Hatebook could decide that this law is unjust and block all users from Nebraska from accessing their platform as a protest. This would do more to get the law changed than a letter writing campaign, etc. Twitter and the other social platforms could follow suit. And sure the company has a responsibility to share holders but that shouldn't override all else. A stance of "we don't want to get involved in politics" is a political statement in and of itself and these companies donate millions to campaigns. Look at all the CA stuff that got abused in a previous election. Or they can say that "they are just following the law" while they collect all the ad $$$. They have the power to morally affect this issue. They can very trivially put out a statement that they will no longer continue operate in states and countries that violate the UN's Universal Declaration of Human Rights. But we see the big players chasing money over humanity and democracy and even decency. And it isn't just Hatebook, look at the concessions Apple and Google and others have made to get access to markets in China and other totalitarian regimes.