>basically replaced the ads of the owner by their own ads

>basically

Misleading wording. The only ads they use are on the new tab page. Hundreds of companies partner with it like Verizon and what not. These are the Brave ads you turn off by disabling the sponsored image in your new tab settings.

> Replacing that income with your own well, that’s dirty

That's like saying uBlock Origin devs are dirty for asking for donations.