Instances (Participation) used for eVar
Hello All,
Situation:
Recently, we did several promotions by banner, by adding parameters on landing page URL, for example:
Banner1: http://www.***.com/index.html?baid=12345
Banner2: http://www.***.com/index.html?baid=12378
There are several links in the landing page and website, e.g. "contact support", "contact consultant".
Once the link is clicked, we can see "Instances" +1 under the name "contact support" or "contact support" under "Link Map" dimension.
Measurement:
Now, we are using the following way to check banner performance:
Dimension: "Link Map", Breakdown by:"baid", metric: Instances
Then in Adhoc, we can see (sample):

If user visit:
Banner1 > Page A > Click "contact support",
then I suppose, 1 "instance" will credit to bid: 12345, and Page A as well.
But if user visit:
Banner2 > Page A > Page B > Click "contact support"
Question1: Whether "banner2" can get 1 credit?
If not, Question2: can I use "instances (participation)", so that Banner2, Page A, Page B will all be credit?
I contacted with our internal analytics engineer, the reply is:
"Participation metric should be used at page level reporting ONLY, but not "bid" level".
I learn from user manual that: Participation metrics assign full credit from success events to all values of an eVar that were passed during a visit.
Then I didn't really understand:
Since bid is eVar1 (I can see it in Adhoc dimension), Questions3: why I cannot use "instances(participation)" to "bid", to evaluate the banners performance?
I didn't see eVar1 by using Digital Debugger...
But since I am not Omniture engineer, but a business user, I would like to have your help.
Thanks for all your inputs.