Facebook reportedly paying teens $20 a month to install Facebook Research app that monitors their smartphone and web activity and sends it back to Facebook. Facebook was forced to remove its Onavo VPN app from Apple’s App Store in August 2018 after it was found to track its user activity and data across multiple apps. Facebook has been using third-party beta testing services that specifically runs ads on Instagram and Snapchat recruiting participants to install the app. Facebook said it is planning to shut down the iOS version of its Research app.
Source: https://thehackernews.com/2019/01/facebook-research-app.html