Google has reportedly launched a "secret" CPM online ad network,
dubbed the Google Display Advertising Network, in tests since Oct. 1.

With the invitation-only Google Display Advertising Network, Google is targeting Fortune 1000 companies, writes John Chow, saying he has been invited and has been participating in the display
and video ad network. "Google has been hand-selecting sites…that they
want to put in front of Fortune 1000 companies. The goal being to sell
these big companies display and video ads at a very high CPM," he
writes (via MarketingVox).

Publishers invited to join the display ad network negotiate a flat
CPM rate with Google, the contracts are for one year, and the
publishers have to guarantee a certain minimum amount of monthly
inventory, according to Chow. "Publishers can serve more than the
minimum amount and still receive the same CPM rate for the overage," he

Google provides "extremely limited" reporting via weekly email,
reporting only weekly ad impressions and pageviews, Chow writes, adding
that he is "not allowed to reveal CPM or any financial data" regarding
the  Google Display Advertising Network.

ON: Googles Display Ad Network via @jpenabickley