Maybe this is where the business practices and the way our businesses are built might differ from others. I apologize for going into a bit more detail than you might prefer.
Our systems operate such that, when we recognize revenue or generate revenue on an ad, it is generally called a cost-per-click model. What that means is that a user has to interact with that ad before we are paid for that ad. We're not paid in a pre-impression manner. That means that, when I say that our systems have been able to block 99% of problematic ads before they're ever served to a user, we are recognizing zero revenue on those ads. It means that we are not taking money from those fraudsters, because we do not want their money. We do not want an ecosystem to be polluted by that type of activity, because it undermines our entire mission.