We just received this email from AdECN. The referral link goes to John Ebbert’s AdExchanger.com website:
Dear AdECN Member,
Thank you for your use of AdECN’s services and participation on the Hosted system of the AdECN Exchange for the last few years. We regret to inform you that AdECN has made the difficult decision to close [...]

Thoughts about the costs of real-time bidding, and who will pay for it, now as a column on AdExchanger:
http://www.adexchanger.com/data-driven-thinking/real-costs-real-time-bidding-rtb/
For people interested in just playing around with the figures in this simple example themselves, here is a  spreadsheet you can input your own values: Excel 2007 Spreadsheet
We would certainly welcome comments and thoughts: there is a [...]