Online investigators have exposed a network of hijacked computers that defrauded advertisers by generating billions of fake ad views.
The so-called botnet scheme, which hijacked 120,000 residential PCs in the US and cost advertisers millions of dollars a month, highlights the increasing complexity and opacity of online advertising.
Spider.io, a London-based start-up that tracks web browsing activity, estimates traffic from the “Chameleon” botnet accounted for almost two-thirds of the total visits to certain websites. The inflated number of page views increased advertising revenues for the websites’ owners.
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