Are there any brave users out there? no pun.
I use ff with DDG on PC and safari with DDG on ios. Never understood the reason for a move.
The ad rewards was just too much information for me, from brave.
I've recently moved to Brave because of their addition of IPS (which I see as an interesting technology). I've been really happy with Brave - especially on Mobile which feel way snappier.
Also not having to install a 3rd pary ad blocker (uBlock Origin) makes me feel more comfortable. Firefox should ship with a good ad blocker - it does not.
I've not played around with BAT yet - it's on my TODO list.
Brave seems to be pushing the boundaries more than other browsers, and it'll be interesting to watch where things go.
The ad system is off by default, AKA opt-in. Did you hear otherwise?