Is it against google's policy to give users who watch rewarded videos, give them points that are convertible for real rewards . For example , Top 3 users will receive real gifts, the ranking is based on points that are gathered by answering quiz questions and from watching rewarded ads
1 Answers
Its against policy to convert them into real rewards. Refer below link for allowed/disallowed policies
Reference - https://support.google.com/admob/answer/7313578?hl=en
Rewarded ads must not be placed in user flows that offer monetary compensation or other incentives that can be converted into monetary compensation (including gift cards, discounts for physical goods or services, and cryptocurrencies).
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