bradbwh - 9:08 pm on Mar 21, 2004 (gmt 0)

How are you able to guarantee that duplicate ads won't be displayed?

I don't believe that is the publisher's responsibility. My interpretation of Google's ambiguous language on this point is not that we must ensure non-duplicity of ads. I think Google is informing us that ads will not repeat across multiple units, and that we shouldn't hope to benefit from ad repetition.

Multiple ad units are allowed. Publishers have no way of controlling which ads appear in any unit. My interpretation is the only one which reconciles these two points. If Google meant something different, the TOS must be rewritten.