It is different because you are collecting money that would otherwise have gone to the sites creator?

(assuming a non ad blocking reader)

Update: I think I see where you are coming from, that as a _reader_, blocking ads in Firefox is the same as choosing to use Brave and willing watching Brave ads so that the Brave company can make money that would otherwise not have gone anywhere. The _reader_ generates no money for the content producer.

But as a _publisher_, an ad blocker reader in Firefox is just somebody who chooses to ignore the ads, but the Brave company is directly monetizing your content without your consent.

I my mind, the difference is that in scenario A. the use wants to be free of ads, in scenario B. the user doesn't mind ads, just not the ads you have chosen to show. And Brave is making money from that.