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It depends on the industry i have seen 30% click fraud - google tends to credit back the money but it could max out a daily budget. -You can also have google to a special audit to see if any strange click patterns are happening.

Hey Ryan Glad you asked! Our competition formula uses On Site Factors (Keyword in Title, Description, URL, ...?)  -> is the page actually trying to rank for the term Page Competition Data (PA) Domain Competition Data (DA) I agree 100% with your example of a Wiki Page, that's why the DA part of the formula has only a very small influence on our competition value in comparison to the PA part. The reason why results 1-3 may show a lower competition average than 8-10, is because Google sometimes shows results, which don't appear competitive according to SEOmoz (eg. Videos, News, etc...) -> that's why we recently changed the default view in SECockpit to show the average competition over results 1-10. Don't hesitate to ask anything else!