I didn't refer you to independent parties. You can check Brave (we provide old versions on github) and you won't ever find us replacing ads in publisher pages. We're all open source on the client side, so you can read revision histories too. If you don't check for yourself, then how do you know what you said is true?
It would help if you named your "independent parties" plural you're relying on. It seems you can't inspect our product or code for yourself. Are you sure you have a reliable and independent source who has checked our work? Hint: not David Gerard.