I have an unverified wallet in brave on windows, I have been seeing ads for months (since I installed it), but have not received any bat.
I have brave on a couple of android devices and it all works fine there.
Looking through my history I can see all the ads I responded to etc - but zero bat.
I guess I could reinstall, if this might fix things, but it wouldn’t get the bat I have missed… so if not resolved, I’ll just turn off the ads.