Anyone use CPIMobi to get cheapest installs for Android app?

[AC Question]

I just developed new app and download it to Google Play Store. I want to buy some traffic for increase app rank. This must be incentive installs from real users and devices on a CPI basis. One my friend used for this purpose CPIMobi and i want to know if anyone tried it?

 

[B. Diddy]

Moved to the Android Apps forum.