this, it's a cryptomoney scheme. They need to promote Brave in order to increase the value of the cryptomoney token. There's also an affiliate referral link program I've seen spammed a couple of times
I'll never understand the normies that use Brave. They're like "it keeps my data private" blah blah blah. Don't trust nothing unless you can see it's code. Also really irritates me when they start recommending it to other uneducated people.