Why are Brave Rewards services hosted on Amazon?

Hi Brave,

When reading the privacy policy for brave rewards (https://brave.com/privacy/#rewards) I noticed the servers for Brave Rewards are hosted on Amazon and Heroku. My question is why Amazon? Amazon has a name for being really bad at user privacy. As a browser which main focus it is to preserve users privacy this doesn’t seem like a logical decision. So, i’m very curious why you choose Amazon and not a service that shows a little more interest in peoples privacy.

Thank you in advance!