Counting unique impressions

If you want to become our publisher, you might be interested to learn what we mean by “unique impressions”.

• One IP address can generate only 1 unique impression in the scope of
  the whole network during a day. This impression will be considered
  unique as it comes from a visitor who hasn’t seen our ads for the past
  24 hours. And this visitor won’t generate another unique impression
  during this day, no matter what sites he visits and what ads he sees.
• If there are several ad units on one page, only one of them will
  receive a unique impression upon page load (the one which loads first).
• Also, if your ad unit is of type “Site”, then only impressions that
  go from the site domain or its subdomains will be considered unique.

This makes our stats incompatible with Google Analytics or any other
web visitors counting services. Our numbers will always be less for the
same traffic.

But here’s the good news: we are neither a pay-per-impression nor a
pay-per-click network. Your earnings depend not on the absolute amount
of unique impressions, but on the share of the network-wide unique
impressions that you generate. So absolute numbers don’t mean much.