i use multiple networks in single app. A mix of startapp, widdit and pingjam works great
What’s good about StartApp???
At least they don’t have issues like appwiz and they give me the best ecpm I can get for inters (specially non-U.S). If you have U.S. traffic, you will earn good with almost any ad network. For non-U.S., you are always like a stray dog looking for food and se* 
Some of my apps on Startapp are giving $5 ecpm (which have more U.S. traffic)
ok this is getting really frustrating. I have downloads but zero revenue. This is only me still?
No real support from appwiz yet…
I just begin to use appwiz and it happens it is not updating at all during the weekends. Don’t know should continue use it or not.
AppWiz update every 15 minutes. Everything fine on my end.
what is the ecpm you are getting for Display Monetization by AppWiz
It varies a lot between apps. I’m not getting as good an eCPM as I do with other networks, but the PPD rates more than make up for it for me.