i quit using them a while ago.  My AM is pretty cool, but I just don't see the incentive to run with them any more.  Same goes for Clickbooth who's been breathing down my throat to send them traffic, but I just can't rationalize dealing with these guys that are slow as shit, have the same offers as EWA, A4D, PKM, Adsimillis etc.  Just doesn't make sense anymore.  Only reason I would run anything with them now is if they have something exclusive that I can't get on anywhere else.  That's not happening, so no traffic for them.