(This is just a short post - I promised to give an update once I have one)
This is just an update that the July bug, that I talked about here: https://www.publish0x.com/crypto-austria/bat-known-current-problem-with-brave-rewards-the-july-bug-xyvopmo , is resolved - I just updated my old setup and verified that Brave Rewards work again, no need to change account or anything.
You need to update Brave to the latest version: "Version 1.12.114 Chromium: 84.0.4147.135 (Offizieller Build) (64-Bit)"
Or inside the browser from the menu "about Brave".
With this new version, ad notifications are working again under Windows.
I have also verified that they work on android.
That's all from me on this - wish you all the best