Ask HN: What is the future of content based ad supported websites?

With all recent events happening regarding web advertisements and ad blocking , indicates that web advertisement going to have hard time earning revenue from typical advertisement.

Either they will have to find a different way of putting ads (sponsored post etc) or have a pay-wall for content access or go out of business .

There are still billions of people in third world countries , who can't make payment online and the advertisement industry is so big that companies involved in this will let it go.

What do you think is going to happen ? Would it be wise for someone to invest time in making content based website ?