1. There are some documented here: https://en.wikipedia.org/wiki/Brave_(web_browser)#Controversies https://en.wikipedia.org/wiki/Brave_(web_browser)#Controvers.

1. There are some documented here: https://en.wikipedia.org/wiki/Brave_(web_browser)#Controversies https://en.wikipedia.org/wiki/Brave_(web_browser)#Controvers... 2. it's based on Chromium, contributing to the Blink monoculture 3. BATs are based on Ethereum, which has its own downsides (still PoW, speculation, ...)