...that said, I installed Brave this weekend and am posting this comment from it, and I gotta say that it's really nice viewing a web without ads. I'd forgotten how pleasant browsing the web can be when you're not downloading the 100 or so ads & trackers on a typical news article and playing cat-and-mouse with their anti-AdBlock code. So from my selfish user's POV, this is a win.
It is far more practical to download an already adblock-included brower than having to mess with extensions on mobile.
I installed it soon after switching to Android from iOS and I have no complaints, it is fast and it just works.
You don't need to "opt in to receiving ads sold by Brave Software in place of the blocked ads" for that.
The earlier concern about data sharing and privacy by advertising companies is not an identical problem to users being served ads.
That's nice, but as a user I have no interest in rescuing the ad industry. The sooner it dies, the better.