Regarding #3, I wrote a script that automatically emails the 20% of customers who get their orders declined, asking them to purchase the app directly through me

Regarding #3, I wrote a script that automatically emails the 20% of customers who get their orders declined, asking them to purchase the app directly through me using PayPal. A surprising number of them do. It's not a perfect solution, but at least it recovers some lost revenue. You can have this feature available for your app through http://www.AndroidLicenser.com http://www.AndroidLicenser.com