Disable the Magic Profiles Feature
Prefinery automatically populates user profiles with their Gravatar profile information associated with their email address, when such a profile exists. Additionally, for some legacy projects we use a third party service called FullContact to enrich the user profile view. Given a user's email address, FullContact will return publicly available social profiles.
If you don't want us to gather profile photos or social data about your customers or don't want us to share end user information with a third party such as Gravatar or FullContact, you can disable the Magic Profiles feature in your project settings.