Since its inception, the company had rules to prohibit applications that send data to third parties , whether data analysts or ad networks … but never clearly stated that they could not send “to other social networks.”
Facebook now says that applications that want to export data to other social networks like Google + should use the “Download your information” but not the Facebook API . Yes specifies that through this format, some data only mail users, only friends who have expressly chosen your privacy settings you want to share that inforamción.
This option is hidden behind a large variety of options in the account settings, possibly the result that few users have been activated. In other words, hardly makes sense to use it, because limited data exported.