OzPunter
When I checked with Betfair IT a couple of years ago the bet transfer module of their of transactional API was still under development. I was told at the time they would probably want 3rd party developers to embed a vendor ID into their programs so they could identify the source from from bets being placed and thereby collect a return off every program sold. I am not sure whether they went ahead with that, but it is probably just worth checking out.

Good luck with your development.