It varies based on ad. Keep in mind that we get paid 70% of whatever Brave is paid for each ad to show. Ad prices change based on a number of factors, so there’s no solid or set thing.
One of the people at Brave does run a site on his own where you can see ad campaigns in your region, how much they pay, view limits, etc. You can see it at https://sampson.codes/brave/ads/my_region/
Estimated earnings no longer exist. It went away early this month. There were numerous posts and even notifications. Part of the ads that were shown to us were of the Rewards Roadmap, which states we no longer have estimated earnings. But of course, this would require people to have paid attention and chosen to read.
You may want to check out some of it, such as:
No I’m not.
Brave is talking about introducing an offer wall. You’ll see that in the roadmap I linked a little above.
But for the traditional Rewards, we see ads and then we get paid the next month. It tallies up all of our activity from the first to the last day, then it pays in one lump sum for that month.