Just to be clear, you should be impressed with pagefair, not the economist. The PF blog has even more information with a no BS mea culpa that would make your grandmother proud:
"If you are a publisher using our free analytics service, you have good reason to be very angry and disappointed with us right now. For 83 minutes last night, the PageFair analytics service was compromised by hackers, who succeeded in getting malicious javascript to execute on websites via our service"
http://blog.pagefair.com/2015/halloween-security-breach/
"If you are a publisher using our free analytics service, you have good reason to be very angry and disappointed with us right now. For 83 minutes last night, the PageFair analytics service was compromised by hackers, who succeeded in getting malicious javascript to execute on websites via our service"