I usually bash these posts, because being a developer who has previously built a number of apps using solely Facebook login I can understand why they don't provide another means of signup. For the apps I have built people who don't have a Facebook account aren't the intended target audience, and I believe it could be easily argued Airtime fits this category. The amount Facebook gives for free (friends, chat, payments, a verified email address, demographics) is really hard to replicate via other means.
In this case though I think they ask for too much before giving anything or even saying what it is about, firstly access to my Facebook account, then requires enhanced permissions (which are meant to be optional, however the app barfs if you don't allow them), then requires you to allow Flash to access my webcam. It's more of a UX thing, but at least tell me what I am signing up to and show me what I can get out of it by allowing access to all of this.
In this case though I think they ask for too much before giving anything or even saying what it is about, firstly access to my Facebook account, then requires enhanced permissions (which are meant to be optional, however the app barfs if you don't allow them), then requires you to allow Flash to access my webcam. It's more of a UX thing, but at least tell me what I am signing up to and show me what I can get out of it by allowing access to all of this.