registration wall

 registration wall  is a UI antipattern used by some silos (like Pinterest and Quora) to prompt users with a sign up or login UI that immediately blocks viewing or using the site, or as immediate requirement to view full content such as an entire article (Narrative Magazine).

https://medium.com/ggv-capital/to-wall-or-not-to-wall-the-user-sign-up-question-3caa2a729adc.

Narrative Magazine
Narrative Magazine shows the first part of a story, and then requires viewers to either login or sign up for a free account. Examples:
 * https://www.narrativemagazine.com/issues/stories-week-2020-2021/story-week/forest-path-anna-ferrandou-sawyer
 * NEEDS SCREENSHOT of UI at the bottom
 * Want to read the rest? Please login. New to Narrative? sign up.  It's easy and free.

Medium
Medium has iterated on several versions of sign-up or login walls, which are sometimes registration walls because they immediately block viewing.

2019-148 sign-up to view
2019-05-28 example that requires sign-up to view one more article