The person is unlikely to have been authorized as a spokesman for AWS. In many workplaces, doing that is grounds for disciplinary action. Hence, throwaway.

Well, when you talk about blameless post mortems and how they are valued at the company... A throw-away does make me doubt that the culture supports being blameless :)

Well, I understand that, but if you look at his account history it is only pro-Amazon comments. It feels like propaganda more than information, and all I am saying is that the throwaway does not add credibility or a feeling that his opinion are genuine.