[TWSS]

You might want to consider a stepped permissions model for the Facebook auth. Asking for a crapton of permissions up front before establishing any trust with the user can be off-putting.

For example, get the email first, give users more info about pricing, how it works, etc., then get photo permissions.

And don't ask for permissions you don't need. Why ask for access to my friends' likes?

[swiil]

Like counts are used in photo sorting/selection. We are still testing that feature.

[TWSS]

You can add more permissions later.