Opt-in only means just that.
To use Wicket facial authentication, all users must explicitly opt in prior to uploading an image into our system. Wicket does not take pictures of users for enrollment without user knowledge; users take and submit their own selfie and provide Wicket with permission to use it to give them access to facial authentication-enabled features, such as facial ticketing, facial payments, and facial access.
In all cases where Wicket makes a decision on a non-registered User, that data is non-identifiable and is not used by Wicket except to match that person against a registered User.