If freedom of speech is absolute, how come it's not applied for private spaces and for the Internet?

No freedom is absolute.

If you’re wondering why free speech doesn’t apply to the internet, it’s because you have no right to use other people’s stuff for free.

False advertising

Scientists: We Built 'World's Smallest Violin' - Newser

You have freedom to travel. If I loan you my car, I can tell you not to take it out of town, because it’s mine, you have no right to use it, and if I give you permission to use it I can tell you what you can and can’t do with it.

Freedom of speech does not apply to:

Trade secrets

I think that being gay is wrong, but I treat gay people respectfully like any other person. Is it homophobic? Or offensive in any kind of way? Aren’t disagreement and discrimination two different things?

Revealing classified information

Conspiracy

Child pornography

How can people balance religious beliefs with seeking professional mental health care?

Perjury

HIPAA violations

Threats of violence

'Rock Showman' uncovers sandstone stegosaur near Whitby - BBC

You have freedom of speech. If I loan you my computer, I can tell you not to use it for certain things, because it’s mine, you have no right to use it, and if I give you permission to use it I can tell you what you can and can’t do with it.

Fraud

Insurrection

What is something you have to share?

Revenge porn

That’s what it is. You have no right to use other people’s stuff. If people let you use their stuff, they can tell you how you can use it, and they can tell you to stop using it any time they want.

And much, much more.

What was the weakest period in US history in terms of military strength? Was it during World War II or the Vietnam War?

Insider trading

Terroristic threats