Another aspect is that companies like Twitter or Meta have legal exposure in various jurisdictions around the world. The libel laws in the UK are different than

Another aspect is that companies like Twitter or Meta have legal exposure in various jurisdictions around the world. The libel laws in the UK are different than that those in the US, etc... They're responsibility for what is on their sites is an ongoing question. They have to have the ability to moderate their sites to comply with local laws, or they have to be excused from liability.