They did. It wasn’t accurate and too many people got stupid about it. It’s kind of like if you look at the long existing post at https://community.brave.com/t/ads-payout-status-update/287895 it explains things like:
Why is my payment amount different than what my earnings was showing?
This is perfectly normal! Sometimes ads do not fully reconcile (“cash in”) before the end of the payment period. So while this does appear in your earnings in real time, unreconciled funds will not appear in the current month’s payout and will instead be “rolled over” into next month’s payment.
Every single month, tons of people would gripe and complain because their payout didn’t match the exact number showed for their ESTIMATED earnings. No matter how it was explained, people seemed not to understand or care what it means to estimate.
Combine that with the idea as described at First to know: Some upcoming changes in Rewards 3.0
Moving Away from “Estimated Earnings”
As part of the Rewards 3.0 update, the “estimated earnings” indicator will be removed from the Brave Rewards interface and replaced with something new. Since Rewards 3.0 will introduce more dynamic ways to earn rewards, the current “earnings so far” estimator will no longer be a useful tool to set earning expectations.