If Brave users opt into Brave Rewards for private user ads in push notifications (which, contra Butterick, do not belong to any page they might be near or above; they belong to the user's inventory, same as new tabs and unrelated windows of all kinds), we still wouldn't put ads in pages without both publisher and extra user consent (too many users still wouldn't want in-page ads, even if opted into user push notification ads).
HN is full of made up nonsense about Brave, in spite of all the hackers here who can verify our open source, network behavior, etc. etc. This site has seen better days.
However, I also had negative opinions of it like many people here before I really dug into it. I think your marketing really needs some work. I don't exactly know what it is - it might not even be your fault. The negative view of crypto many have has been associated with it. I would remove all mentions of crypto from your website. If people really want to know how the tokens work, they can go into the documentation. Having the word crypto on your landing page does you no good.
Talk is cheap, especially stories that don't pass any kind of smell test: we would not take our life into our hands by collecting any user data, when it's easy to discover that for real hackers.
https://brave.com/data covers our data policies for baseline and optional stuff.