He released the code to libafta, someone should make an open source front-end for it, that would probably kill his idea of getting money if there is an open source front end. I would do it if I was more skilled
Actually, that could be a job for libretro and RetroArch since RetroArch has been designed to work with dynamic/shared libraries to begin with.
However, libretro FBA already runs way better than his own FBA port (the port couldn't have been more lazily made to be honest) so after RetroArch gets released on Android I honestly don't see why you would want to suffer through Push ads or pay for any of the other 'payware emus' - the way to combat this is to simply undercut it by providing a better free alternative.
That, and if I push libretro FBA with the recent Android changes upstream, there should be even less incentive from these people to try to make a profit from it since a very good version of FBA for Android will be available in mainline.