Instagram allows the user to easily hide or report ads

Instagram | G8: Support efficient dismissal

Instagram explains the consequences of user actions.

Instagram | 16D: Convey the consequences of user action in help and documentation

Facebook asks user to choose accounts to see first.

Facebook | 16A: Feedforward: Convey the consequences of user actions before the user takes action

Facebook uses existing public interaction data as feedback.

Facebook | 15D: Use existing public rating or interaction data as feedback for the system

Twitter uses existing public interaction data as feedback.

Twitter | 15D: Use existing public rating or interaction data as feedback for the system

Twitter enables users to report inappropriate tweets.

Twitter | 15C: Reporting inappropriate content

Instagram enables users to report inappropriate ads.

Instagram | 15C: Reporting inappropriate content

Instagram enables the user to provide feedback on each ad.

Instagram | 15A: Encourage explicit feedback on individual system outputs

Facebook gradually updates its "Suggested for You" posts.

Facebook | 14A: Comprehensive updates

Goodreads shows explanations based on user behavior.

Goodreads | 11E: Map user behaviors to system outputs

Instagram explains how it decides ads.

Instagram | 11B: Global explanations

Pinterest shows explanation for recommended Pin.

Pinterest | 11A: Local explanations