You can either make things a public service, try to codify into law what content a business must and must not engage in faster than content changes, or have some content businesses are not going to host.
And it doesn't have to be universal. E.g. you could decide DNS and internet access need to be a public service but since those two are always available you don't need to try to regulate the content on VPS since self hosting is an option.
And it doesn't have to be universal. E.g. you could decide DNS and internet access need to be a public service but since those two are always available you don't need to try to regulate the content on VPS since self hosting is an option.