Shaggz, I agree... but would each unit then be counted as the only unit on the entire page? I mean, here is what I'm getting at. For example, in a given adsense unit the top spot pays the most:
FIRST ADSENSE BLOCK
Advertiser 1: $1.00/click
Advertiser 2: $0.40/click
Advertiser 3: $0.28/click
Advertiser 4: $0.24/click
SECOND ADSENSE BLOCK
Advertiser 1: $0.20/click -or- $1.00/click?
Advertiser 2: $0.19/click -or- $0.40/click?
Advertiser 3: $0.14/click -or- $0.28/click?
Advertiser 4: $0.12/click -or- $0.24/click?
In the subsequent etc iFrames containing adSense units, are they each counted as individual units and don't see any others?