ReveNews points to a new form of search engine marketing fraud, where competitors temporarily turn their own campaigns off and then flood certain keywords with thousands of searches. The many impressions without clicks causes Google to decide that the competitor ads are not as relevant and may even cause the suspension of their campaigns. The practice, called impression spam, was first reported by antifraud site StopScum.com earlier this month. Purported victims of impression spam writing in to StopScum.com say that Google has recognized the problem and even has helped prevent some obvious examples, but for the most part will not recompense advertisers for losses. Google does compensate advertisers for losses incurred from click fraud.