I believe that the BAT rewards for Windows 10 PC is broken.
Back on March 11th, the only ads I started receiving were the sponsored ones.
However, even those have no rewarded any BAT.
Fast forward to April 6, the day after when rewards are able to be claimed.
The balance is still stuck at 5.295 BAT, and was unable to be claimed.
I cannot speak for everyone, but it seems there is a large majority that are having similar issue.
Brave on my android has worked great but it seems the Rewards for Windows 10 PC is broken