I think I am getting paid per impression

How do I know for sure...

[MediaSpree]

Yesterday I had $8.50 earnings unaccounted for in my channels. This represents almost 50% of my total earnings for the day. Everyday up until now my channels total has matched my aggregate total. Does this mean I am being targeted for a CPM campaign? Is it a glitch in the matrix? I wish there was someway to know for sure if you are being paid per impression. Any ideas? Thanks!

[foxtunes]

CTR is down 50 percent last through days, and epc has dropped through the floor - I'm wondering if the same thing has happened to one of my sites.

[martinibuster]

Go through your website and look for a single ad that dominates an entire ad unit. That may indicate a site targeted ad. They don't always show up, sometimes you have to refresh the page.

[hunderdown]

Go through your website and look for a single ad that dominates an entire ad unit. That may indicate a site targeted ad.

But it could also be one of those "expanded ads" that Google has been serving up on the CPC side, right?

[moneyraker]

[I wish there was someway to know for sure if you are being paid per impression. Any ideas?]

I sometimes get a few extra cents here and there with no corresponding increase in clicks. Maybe that's CPM earnings. Of course, it can also be due to asynchronous updates. I guess we will never know until G puts a 'CPM campaign earnings' column in our stats.