2 ms·
"They could even do it to all (or some subset) of visitors via Google Analytics[1] to report the (x,y) position when click occurs. It wouldn't surprise me if an
by bootload 11y ago
"They could even do it to all (or some subset) of visitors via Google Analytics[1] to report the (x,y) position when click occurs. It wouldn't surprise me if an awful lot of the internal use of GA is for ad-fraud detection."
This is what I'd suspected, randomised sampling.