$$ Rent your flash AS3 App out month by month and block non payers!

Hello I’m building a flash app game that I want people too rent from me monthly. How do I disable the app for nonpayment?? What ways will anyone of u do something like this?? Could I give each buyer a personal embed code for his website and if he doesn’t keep up payments disable the embed code? I have bin trying to think out a hack proof a strategy but can’t.

  1. Any Ideas??

  2. Also are there any automated ways like threw a membership subscription??