Could be interesting, even though most of this was already doable through the regular API, some new interesting things (send Request to a friend for example is

Could be interesting, even though most of this was already doable through the regular API, some new interesting things (send Request to a friend for example is a nice idea). But with the FB Credits thing, i'm not sure what are the implications in terms of revenue stream, if my app already as an advertiser platform, do i have to funnel it through Facebook, or FB Credits are just for end users? Anybody as more information regarding this?