The $7.2 billion number represents about 5% of worldwide online ad spending. To give you an example of how fuzzy this number is, the WFA (World Federation of Advertisers) says that the actual amount of fraud could easily be 30% — or six times this.

Believe it or not, if fraud accounts for just 10% of the online advertising system, in 9 years ad fraud will be the second largest source of criminal activity in the world, second only to drug trafficking.

Bob Hoffman on ad fraud.

 Given that both the people being ripped off (i.e. companies advertising online) and the people doing the ripping off (i.e. people selling online ads) are both part of a garbage ecosystem, I’m really not sure exactly what I feel about this…