They might not be having this campaign next year
Application verification — Users can choose to enable “Verify Apps" and have applications screened by an application verifier, prior to installation. App verification can alert the user if they try to install an app that might be harmful; if an application is especially bad, it can block installation.
from:http://developer.android.com/about/versions/jelly-bean.html
near the bottom
there is also a confirmation dialog that will pop up if a sms to a premium number tries to send