Wasn't Brave browser caught replacing ads with its own? And the Honey extension replacing / injecting referral codes?

> And the Honey extension replacing / injecting referral codes?

Fraud in larger scale and using other people's computers.

Was it ever prosecuted with the same vigour?

It's a corporation so I'm gonna bet no.

I can't speak to the Brave thing, but the Honey thing is another example of fraud, yes.