CPX Mass Deactivation of Publishers??

I have recenely heard that CPX Interactive recently went through a "mass de-activation" of publishers on the DMX (Direct Media Exchange network of networks, recently acquired by Yahoo).
This looks like it is part of a push by CPX to "weed out" certain publishers – though unclear right now what based upon? To increase their publisher quality.
What I don’t have any information on – has this affected CPX publishers who used CPX ad code directly, rather than through the DMX?
Does anybody know what the criteria are CPX is using to sort through and decide which Publishers to re-activate? Has anyone gone through this?

See original post by kburb23