Fan-gating

This content is typically exclusive features, promotional offers, games or other material.

[3] If fan-gating is overused with an inadequate payoff for users who agree, it can lead to Like fatigue.

Damage the user experience, resulting less time to your fan page.

[5] In August 2014 Facebook updated its platform policy to combat fan-gating, with an explanation that artificial incentives do not benefit people nor advertisers.

[6] Since then a lot of webmasters and app developers shifted away from the practice of like-gating.