Okay, some apps, such as FeaturePoints, tie itself to the system somehow. Like no matter how many times you clear the system data, wipe cache, etc....it keeps that information on your phone. I guess it goes by serial # or something. But I have FeaturePoints on my phone but the referral code I used it linked to someone I don't wish to support anymore. The only way I can input another referral code is to be able to start over as if the app has never been installed on the device. I know Apple uses a UDID which can be changed via a Jailbreak tweak. I used to use Grindr Xtra for like 30 days by changing my UDID every time I wanted to use it. Other apps do the same thing I believe....so is there any way to change the serial # or UDID (if thats what its called on Android) to make it think the app is being installed on a device for the first time?