There has been PLENTY of response from Brave’s side in other threads with this same issue. They are still trouble-shooting the issue.
Wait until the next payout date (around 5 April) to see whether or not you get paid for those sponsored images. As I said previously, I don’t see those ads reflected in my “Estimated pending rewards” or my “Ads received this month”, but I DID receive payment for them on 5 March.