How're you affording this?
I sell advertising space in the outbound phone calls to someone like a dating site. "Hi, here's your excuse to leave if you want. But next time, use SomeOtherDatingSite.com to find a better match!"
See, it's a foolproof plan.
I'm fortunate to be able to put a bit of cash into a slush fund for giving away things like this for free. (I have other free apps that are costing me a LOT more to run, though still in Beta.)