How do you catch if a CPA network is pulling a fast one on fraud?

[Streamline]

spot on. fraud can be sneaky as hell, u gotta stay on top of patterns and weird spikes. i remember once a network suddenly had a surge in clicks from some random country, turned out they were fake. gotta keep an eye out for that kinda stuff.

 

[Stock]

Been doing this 3 years, saw a network suddenly spike in clicks from a random country, all at once. Turns out they faked the geo data, tried to hide it but I caught the pattern. Fraud ain't always obvious but patterns usually give them away.