Turning your advertising presence over to a mega utility that promises effect and timely ads with little customization for you is inefficient for all but the largest web sites. Our vendors select everything about the visibility of their ads.
Know that the ads that are on your site are going to get views and clicks because they are in front of the "right" audience.
We are both merchants/vendors and web hosts. We have services and products to provide and we have a web presence that we would like to monetize. We were looking for the same things that you are looking for. That is where eTRAXC came from.