Hi HRH,
Definitions as follows:
Impression
Fabulous records "impressions" as the total number of views/hits your domain receives; basically, any activity on the domain name including spiders and bots. One visitor can generate a number of impressions.
Unique
A "unique" is an impression/view of your domain name by a customer that has not visited that domain in the last sixty minutes. One visitor generates one unique.
Click
A "click" is the action that a visitor takes when they click on a link on your domain. If your domains are serving PPC listings, you will be credited for every valid click your domains generate. We only record unique clicks, so if one visitor clicks 3 times in sixty minutes, it shows as 1 click in your account with the earnings showing as the total revenue from all 3 clicks.
In regards to your domains that are receiving volumes of impressions, yet no uniques, this is most likely spider/bot activity. However, Fabulous only records "known" spiders. For example, Google, Yahoo, MSN, etc.
Domains on Holding Redirection is the default redirection when you import domains. If you have domains on this redirection is means they have not yet been set to our Premium program.
I would suggest contacting your Account Rep with a list and having them reviewed and set up.
Cheers,
Mike
Fabulous.com