Guys,
Just wanted to get some insight from you Mobile Masters. We all know there are literally hundreds of Mobile Networks out there, but How many traffic sources do you typically scale out to when you when find a winning campaign. I am a big believer in 80/20, and just wanted to see if alot of you guys are finding it worthwhile / profitable scaling a winning campaign beyond the 10-12 or so major networks, ie, Decisive, Inmobi, Jumptap, Buzzcity, Admob, Airpush exc.
If you've got a successful campaign with a decent ROI, scale to as many as possible. You're really getting more than just $$$, you're learning how to use different sources, which can pay off big time down the road. On mobile, I've only gone to 15 - sometimes you'll find you're competing with yourself, but the best ROI always comes from smaller networks in my experience.