A VPN (Virtual Private Network) is a benign technology that allows users access the internet through another’s internet connection or IP address


Why Is This Important:

Though using a VPN is not generally considered a criminal activity, device farms (also called click farmsphone farms) often use VPNs to hide their real locations. While many IP blacklists contain records of known “anonymous IP addresses”, savvy device farmers use premium or proprietary solutions to access fresh IP addresses, hiding their fraudulent activity. 


Why AppsFlyer:

Relying on its massive mobile device database, AppsFlyer creates a blacklist of IPs and device IDs that consistently shows irregular behavior of unknown devices, blocking them from reaching your traffic.


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