Alphabet Just Struck a Major Blow Against Internet Ad Fraud

According to one study, of every $3 spent on digital advertising each year, $1 goes to fraud. And botnets are responsible for a good portion of that. 
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It's unclear how much traffic the three botnets Google has singled out -- Bedep, Beetal, and Changthangi -- have been responsible for, but they reportedly account for more than 500,000 infected computers.  
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