Tangential to the actual topic of discussion: what exactly has changed in Facebook's developer/app policies that an app like this is possible today, while a ye

Tangential to the actual topic of discussion: what exactly has changed in Facebook's developer/app policies that an app like this is possible today, while a year ago something like Breakup Notifier was blocked from Facebook's API? Was it just that Girls Near Me hadn't gotten noticed yet? (I see that Foursquare blocked Girls Near Me from their API, but I haven't seen a response from Facebook yet.)