Unity Ads - Unity Ads allows to supplement the existing revenue strategy by allowing to monetize thr entire player base.
Google Opinion Rewards - Answer quick surveys and earn Google Play credits with Google Opinion Rewards.
MoPub - MoPub is a mobile monetization platform that helps publishers drive more revenue from advertising and mobile transactions.
Quick Thoughts - Quick Thoughts: Take Surveys Earn Gift Card Rewards is a free to use application that allows you to earn survey rewards like Amazon Gift Cards and others.
Appodeal - Appodeal is a supply-side platform for mobile apps, that serves and protects publishers rather than advertisers.
Branded Surveys - Branded Surveys is a platform that conducts market research by collecting data through surveys from customers and sharing that information with brands to help them optimize their products and services.