- - Google
- -- Google AdSense
- ---- Cause of invalid clicks?
Pirate - 4:42 pm on Mar 30, 2005 (gmt 0)
Could be charity ads for a small part of your traffic. Maybe there isn't ad inventory for a specific niche (channel) on your site for a specific traffic origin.
Thread source: http://www.webmasterworld.com/google_adsense/5876.htm
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