Eight apps in Google play with more than 2 billion downloads caught abusing user permissions to generate ad revenue. Google estimated the loss close to $10 million stolen from it and their ad partners by generating fake traffic. Among the eight apps such as malicious apps, seven apps owned a Chinese company called company Cheetah Mobile and another app owned by Kika Tech, a Chinese based company. Both apps tracked users when they are downloaded new apps and use their to claim the credit, this process called as click flooding and click injection.”]
Source: https://gbhackers.com/8-popular-apps-ad-fraud-scheme/