"We want to ensure that your keywords get a fair chance to run and that we do all we can to properly gauge their performance. Therefore, borderline keywords slightly below our minimum clickthrough rate (CTR) of 0.5% may accrue at least 1000 impressions or more, depending on their actual performance. However, keywords well below the minimum threshold that are likely to perform poorly will be disabled sooner so that you can focus your budget on keywords that get results."
This suggests your CTR has to fall below 0.5% and mine is 0.9%.
Important Reporting and Analysis Notes
* The performance monitor takes only your performance on Google properties into account.
* The CTR displayed in your reports includes expanded matches (from the broad keyword matching option) and ad network distribution. However, because our performance monitor doesn't consider these statistics when evaluating your account, your keywords may still be disabled even if your reports show that you're above the minimum required CTR.
[edited by: eWhisper at 12:29 pm (utc) on April 24, 2005]
[edit reason] Fixed Link [/edit]