I would definitely move to zone-chaining. As you are finding out, having highly targeted contract campaigns in OpenX can cause major issues for the maintenance engine; if you hit this problem, chained zones is the only way I have come across to improve the situation.

I hope this helps!

Given the size of most of our sites and advertiser needs for various combinations of targeting we’ve gone with the delivery limitation approach. Unfortunately, though, it does cause prioritization issues for the engine.

To solve the problem, we tried this (copying the same creative into three banners under each individual campaign): 1 – hyper-tarted (weight 3), 2 – semi-targeted (weight 2) and 3 – run of site (weight 3).

Unfortunately this broke the system. I think it had to do with using the same creative but still haven’t figured that out. OpenX seems to generate unique filenames off the contents of the actual files (MD5′s I guess?). So we would have to change the file to fix this which isn’t really manageable.

Any suggestions for my problem? Should I switch to zones and chain them? Is there a way to prioritize delivery limitations that I don’t know about?

Thanks in advance!

DW