It was the guy who said "Thank you for sending this in. This is a known workflow within our platform. We are committed to always improving our customer’s experi

It was the guy who said "Thank you for sending this in. This is a known workflow within our platform. We are committed to always improving our customer’s experience and have been examining ways of minimizing the type of behavior you are describing." It sounds to me like he read your email about the vulnerability, dismissed it as "on the backlog" and skipped the bit about the fact you had sinkholed lots of traffic. We only have one side of the story though, so who knows. Lessons can be learnt.