Wow! We have come a full circle in 2 years from-
in 2019 to-
in 2021. But the confusion over Reward counters in the UI continues. Now that I think of it, may be “Estimated Pending Rewards” was better. 
Only if Brave can find a full-proof way to decrease “Estimated Pending Rewards” as and when rewards are processed to verified wallets, may be through a message/encoded-key in the transaction to custodian that browser can idnetify and detect that payment (borwser keeps track of funds at Uphold anyway). It should easier to do for unverified wallet where a claim button appears.