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.
The New York Times Company
Facing falling revenue from print advertising in its flagship publication in 2011, "The New York Times", the company introduced a paywall to its website. As of 2012, it has been modestly successful, garnering several hundred thousand subscriptions and about $100 million in annual revenue.