Paywall
A paywall is a method of restricting access to content via a paid subscription. Beginning in the mid-2010s, newspapers started implementing paywalls on their websites as a way to increase revenue after years of decline in paid print readership and advertising revenue. In academics, research papers are often subject to a paywall and are available via academic libraries that subscribe.
Paid content
There is some evidence of opportunity for revenue already – custom publishing is one area proven to be thriving in the online media world. Another is the common payment system implemented in Slovakia and Slovenia by Piano Media. In this model publishers agree to go behind a paywall simultaneously and then start to charge the customer for access to all newspapers and all articles. While not all content is paid, exclusive content is and the model enables publishers who are unable to erect a pay-wall by themselves to start earning revenue outside of advertising from the internet.