You keep saying "stealing", I just downloaded (and am now using) Brave, and with a clean install it shows no ads. No "normal" ads nor their own ads.
I just don't wanna see ads; why is that wrong?
It's opt-in. I downloaded the browser, I am using it, and I see no ads, and Brave makes no money of ads.
In order for me to see ads, I have to go into the settings and turn on the flag.
In order for Brave to profit, the user has to go into the config and turn some setting on.
I fail to see how this is stealing, because Brave does not get revenue unless the user takes some specific steps.