your KR campaign looks like it has promise
it seems like your testing too many different types of banners/angles.
Your win rate is a bit high, you could probly go lower on the bids
Im not familiar with gaming, but in my experience, using landers always gets better conversion rates than anything else.
This is a awesome thread! I thank you for the information that you are building up here! I am starting to get into Game AM. By the looks of it your CPC is very high But from all the lessons I have taken with ZENO you have a high CTR. LIke Johnaff said lower your bids. 
Hi Fabio,
Nice thread you got started. I am also promoting app installs on Go2mobi (mainly utilities apps). However what I have realized recently is that app installs thru banners aren't really converting well.
Have you try using the min bid and scaling up from there?
And also as jonaff said I think you are testing too many banners at once.
Maybe try to stick to a maximum of 10 banners at all times and switch them out?
http://stmforum.com/forum/showthread...l+Significance
Caurmen did an awesome guide on how to cut ads using statistical significance.
Would love to chat more with you and we go exchange some pointers along the way
Please feel free to add me on skype apmdarryn@gmail.com
APM Darryn.
Try pop traffic dude, more suitable for utilities these days IMO. All the best!