An interesting idea borrowed from the Internet universe. Read a brief instruction, answer a couple of questions, and receive a bonus. In my opinion, it is excellent. Users join the game and simultaneously become motivated to gain better understanding of it. We have loyal and well-informed users. In my opinion, this idea is so great that can be applied almost everywhere.
Our application, called Numbuster, became very popular in the CIS countries. Rating other people attracts attention. You can click "Like" or "Dislike" for each of your interlocutors, and then see the contact list.
During each incoming call the subscriber ratings are visible.
Would you be interested in evaluating your friends after every call, after each sms? Of course you get a push notification or an email notification.
Try to ignore it and not pay attention to your ratings.
Ilya Osipov - Entrepreneur, expert on freemium products, author of articles about virality, retention and gamification.