Why did news go behind paywalls?
Because the advertising model that funded journalism for a century collapsed, and nothing replaced it at comparable scale.
What happened to advertising. Newspapers were historically funded mostly by advertising, not by the cover price — and classified advertising was an enormously profitable category. The internet destroyed it: job listings, property, cars and personal ads moved to dedicated sites that did the job better and cheaper. That revenue did not migrate; it disappeared from the industry.
Display advertising then followed, with the overwhelming majority of digital advertising growth captured by a small number of platforms. Publishers ended up selling attention into a market with effectively unlimited supply, at rates far below print.
Why the free model failed. Digital ad revenue per reader is a small fraction of print's. A publisher could increase traffic enormously and still lose money, which drove the traffic-chasing era — clickbait, aggregation, slideshows — that damaged credibility without solving the economics.
The main paywall types:
Hard paywall — nothing free. Used where the content is essential and specialised, such as financial and trade press, which is why that sector adopted it earliest and most successfully.
Metered — a number of free articles before payment, balancing reach with conversion.
Freemium — some content free, premium content paid.
Dynamic — algorithms deciding what to meter based on reader behaviour.
The alternatives in use: voluntary contributions, as adopted by the Guardian; membership models offering more than access; non-profit and foundation funding; public funding; and newsletters where individual journalists sell directly.
The genuine tension. Paywalls fund journalism and restrict access to it. Information with public interest value — health, elections, safety — sits behind payment while low-quality free content does not, which has real consequences for who is well informed.
Many outlets unlock critical public-interest coverage, which is a partial answer.