They block their rival's ads and bring their own instead. It might be visible on a little different location, but in the end the result is the same; replacing ads from the websites.
> Rather than displaying Ads on web pages, Brave Ads appear as push notifications on your device that you can choose to engage with or dismiss.
I did not say it is a default behavior, but in the end you are blocking ads and bringing new ads, hence replacing. Just an another way to provide ads. Just a different way of seeing the concept as a whole.
"They block their rival's ads and bring their own instead" would be taken by most people to mean replacement in the page, and no opt-in. It's misleading with a purpose. Brave is providing users a private (no tracking) ad option with 70% of the gross paid to the user. If only a "rival" did that. But they don't, and we block tracking scripts more than ads (this kills the whole waterfall so blocks most ads). Note we don't block Google or other search ads, or first party ads that don't depend on tracking scripts.