OK, so obviously you can't win all battles since some guys might be exclusive on an offer paying them insane amounts compared to you, but that aside.
Then There's the obvious of optimizing the hell out of your banners, rotating the winners rendering the highest EPC and then there's the multivariate testing to identify the best landers. And lets not forget frequency cap if bidding CPM.
Is there any other, creative, out of this kind of method? Who wants to brainstorm?
I'll start - Appeal to people's emotions. Here's the best example of what I mean -> http://www.youtube.com/watch?v=HX5aRzXUzJo
Cheers
This is a great read for ways to deal with bidding war problems: http://stmforum.com/forum/showthread...ic-Bidding-War