This is why I'm in no rush to port my app to FB, I did some trials and worked out how the FB api works with some test apps, but as far as making money from ads

This is why I'm in no rush to port my app to FB, I did some trials and worked out how the FB api works with some test apps, but as far as making money from ads I don't see it. You have to somehow get people from FB to your own domain where you can really hit them with adverts :)