There's a few people here that are repeating a theme that they don't understand Brave's brand. Let me explain what my take on it is.
The CEO has been pivotal in important parts of the internet, he created Javascript and co-founded Mozilla. He seems to be trying to creating a more useful and equitable internet, that's more for users and less for large corporate interests.
All the things I've seen are in support of these goals.
BAT / the ads system he proposed => trying to make the funding for internet sites more balanced for the roles involved, and sustainable both culturally and economically. You can read his thoughts/philosophy on this, he's eloquent and it's informed and interesting - make sure you get it from the source of his own writing instead of the many attacks on him.
The best Adblocking available => not blockable by google, fastest runtime performance. Good for users, less for megacorps.
IPFS => not having much impact now, but aligned with the goal of balancing power away from megacorps towards users.
Calls/Jitsi => again, away from megacorps toward users.
Notice a theme here! That's the brand, however he's not going to sell you on it, hes not spending money doing megacorp 'branding' instead he's quietly making genuinely useful things.
He's actually continuing the mission of what Mozilla was formed to do long ago, before it was overtaken by the G megacorp.
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n.b.
I would say that the theme of rebalancing power away from megacorps towards users probably explains why he gets continual astroturfing, as opposed to the wokeist reasons that are usually stated for it, but thats a different converstation.