The pay-per-click environment is changing rapidly. Microsoft’s attempted acquisition bid has forced Yahoo! in to an ad-distribution deal that will see Google AdWords appearing in place of Yahoo Search Marketing ads across much of the Yahoo! network. Yahoo! was using PPC advertising delivered by Google to bolster revenues in order to push Microsoft’s bid price [...]

A lot of people focus in on how to get refunds from Google or Yahoo for Click Fraud issues. Google doesn’t always call it click fraud, they often call them invalid clicks, and when they catch “invalid clicks” they pro-actively discount your bill accordingly. They don’t catch everything, but they do try hard. [...]