“It’s a pretty specific issue involving some minor sites. Some of the networks themselves are major, but it would be a different story if this were happening with some big-name sites,” Kent-Uritam told ClickZ. “Any time you deal with an ad network, there are going to be issues about where your ad appears. That’s why it’s important to know what you’re buying, and keep track of your performance.”
via ‘Invisible Ads’ Scam a Real Issue, But Damage May Be Slight – ClickZ.
