Most major news sites, as well as some other sites of reading content like Medium, have a paywall for certain articles, but those are easily defeated by people who bother to search the internet.
As I suspect said companies are aware of that, and they don’t react to properly protect their paid stuff, what do they expect to gain?
Enough people want to pay for the convenience of getting all their news from one place so I guess they figure it doesn’t really make that big of a difference