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.
Observer (Dunkirk)
From March 13, 2014 to October 31, 2016, the entirety of the newspaper's Web site was placed behind a paywall. The site had been behind a paywall for most of the early 2000s but that paywall was also eventually removed.