To be honest, I didn't think of it as anything sinister at that time. AWS had such high octane culture to move fast and innovate that I actually felt what they had done was quite smart. It was a super competitive culture and people did whatever was needed to build new things. On a day to day basis the only pressure was to build... I don't remember instances where ethical guidelines were brought up. So, in a way, the outcomes were a result of what people were rewarded on.
Only after I left AWS I started thinking it was ethically iffy. I still believe Amazon is an amazing company and my time at AWS was one of the best learning experiences.