I've asked some of my friends that are more experienced with Avazu mDSP, and they told me that the standard clickloss is around 10-15%, which is around the same as many other traffic sources or even lower than some. With double meta refresh, clickloss can go up to 30-40%. The 50%+ you're experiencing is certainly excessive by any standard. When you're running with other sources are you seeing the same phenomenon? If you're not, then at least we'd know it's not due to a problem with
I've asked my contact at Avazu mDSP to shed some light on this too. When she responds I'll update this thread. Let's see if we could get to the bottom of this...
Amy