How "private" is Brave Browser?

I installed Brave on my PC a few days ago, and then today I received an advertisement from them in the mail thanking me for installing their browser. It is pretty disturbing to me that they knew my exact address, so I immediately uninstalled the browser from my devices. I have been using Brave for quite a while, but this is the first time they sent me physical mail. I did some research, and they seem like they might not …

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