- - Google
- -- Google AdSense
- ---- Adsense: how many ad units per page work for you?
netmeg - 2:20 pm on May 9, 2012 (gmt 0)
I don't think there's anything in writing anywhere, but I seem to remember it in terms of "millions of pageviews per month" that I once heard from someone who was a premium publisher.
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