I tried to market my site some time ago, however there wasnt any ads for my site, so I removed them...
right, when a new site tries it out but there are no bidders right away the publisher is likely to go to another ad serving service. if there was some advertisers whose bids would automatically start serving as soon as the site gets approved it might at least decrease the level of churn.
also, with there being so little advertiser interest, the publishers are getting less revenue than even adwords cpm it appears. i don't know a solution. some smart cookie is going to do arbitrage -- by brokering ad impressions from some other service and have the ad impressions occur courtesy operation fabulous with the lower rates.