Note: In some scenarios where an SNS subscription requires authorization (e.g. an email subscription), if you immediately authorize and then attempt to use fugue kill, your subscription may not be successfully deleted. We recommend waiting 10 minutes before issuing the fugue killcommand, otherwise AWS indicates that orphaned subscriptions should be removed within 72 hrs.

AWS details are available here -(http://docs.aws.amazon.com/sns/latest/dg/CleanUp.html)