The past few months I received 0 BAT although I have Sponsored Images activated and view dozens of them per day.
I took screenshots before and after the payment date for proof.
Earnings from Sponsored Images are not included in the “estimated” payments so to find out how much you received of the promised 70% from sponsorship deals, you need to calculate actual payments minus estimated payments and the result is the Sponsore Images payment. In my case it’s zero. The same applies to other Brave users I know in person.
So either Sponsored Images are a hoax or there’s a major bug.