As far as FB, we only ask for your email.
"thirdplace is requesting permission to do the following:
* Access my basic information - Includes name, profile picture, gender, networks, user ID, list of friends, and any other information I've shared with everyone.
* Send me email - thirdplace may email me directly at <email>
* Access my data any time - thirdplace may access my data when I'm not using the application "